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#21
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The 455 weighs in at 8 lbs more then the 350 and yet makes a easy 50 more ft lbs of torque in a far more street / strip frendly rpm range even if it's only at 8.2 compression!
If the 455 was a 4 bbl motor then it has better heads then the 350 also. I gues you know what my pick would be!
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#22
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455 hands down. Only problem is handling the torque. Clutch,rear, suspension needs reinforced or at least checked for good welds,rust.
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#23
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The 73 455 I have in my car had 4X heads and appeared to be as mother GM built it when I got it. I sweated the pilot bushing thing too, since I had already installed a TKO in the car. It turned out the 455 was machined for a pilot.
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frittering and wasting the hours in an off hand way.... 1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core. |
#24
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455 all the way!
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Chris D 69 GTO Liberty Blue/dark blue 467, 850 Holley, T2, Edelbrock Dport 310cfm w Ram Air manifolds, HFT 245/251D .561/.594L, T400, 9" w 3.50s 3905lbs 11.59@ 114, 1.57/ 60' |
#25
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It looks like it's a factory 4 barrel motor.
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#26
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I too needed a bushing fitted on my 455 build. Not a big deal.
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#27
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For 1200 I would jump on the 455. Then offer 500 for the 350
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#28
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73' YC is a factory 4bbl.
Doesn't really matter, but I think you need to check P/N and date code on that intake. It is a factory intake but I don't think it's a 73'. Looks like I see an EGR valve. Don't recall seeing EGR on 'non' CA smog engines. Far as I know the YC wasn't CA smog rated. IDK Clay |
#29
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Ok gd info picking it up sat.
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#30
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Quote:
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#31
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Took a couple of screenshots from video he sent, not sure if you can tell from them.
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#32
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It looks like a AFB square Bore Carb on a adapter to mate it to the factory Qjet Intake.
That fuel filter sitting right onto of the very hot Exh crossover section of the heads needs to be relocated!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#33
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Quote:
Jon.
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"Good carburetion is fuelish hot air". "The most expensive carburetor is the wrong one given to you by your neighbor". If you truly believe that "one size fits all" try walking a mile in your spouse's shoes! Owner of The Carburetor Shop, LLC (of Missouri). Current caretaker of the remains of Stromberg Caburetor, and custodian of the existing Carter and Kingston carburetor drawings. |
#34
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Well if you want to get into detail about the last true GTO was in the A body line, not the relabled Chevy Nova body line .
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#35
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LOL, love these discussions.
But yeah, 455 all day long. Will feel much more powerful due to all the torque it'll make. Cubic inches is what makes torque. Build two engines with the same heads, cam, intake, exhaust, carbs and compression ratios but one is a 350 and one is a 455 and they'll make close to the same Horsepower on a dyno but the 350 will make it at much higher RPM and have less torque overall. The 455 will make a LOT more torque and at lower RPMs. I have a bone stock '73 455 in my Formula currently. It doesn't want to run out past about 4500 RPMs but it absolutely shreds the tires from a stop or at low speeds. A 350 won't do that.
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---------------------------- '72 Formula 400 Lucerne Blue, Blue Deluxe interior - My first car! '73 Firebird 350/4-speed Black on Black, mix & match. |
#36
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Quote:
That makes no sense. Based on that, the A body GTO was simply a relabeled Chevelle.
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frittering and wasting the hours in an off hand way.... 1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core. |
#37
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[QUOTE=Will;6102314]LOL, love these discussions.
But yeah, 455 all day long. Will feel much more powerful due to all the torque it'll make. Cubic inches is what makes torque. Build two engines with the same heads, cam, intake, exhaust, carbs and compression ratios but one is a 350 and one is a 455 and they'll make close to the same Horsepower on a dyno but the 350 will make it at much higher RPM and have less torque overall. The 455 will make a LOT more torque and at lower RPMs. I have a bone stock '73 455 in my Formula currently. It doesn't want to run out past about 4500 RPMs but it absolutely shreds the tires from a stop or at low speeds. A 350 won't do. The GTO it's in has 60's out back and he said it just shreds the tires. LOL |
#38
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Quote:
73+ X cars shared quarter panels, doors, fenders, trunk lids, etc. Nova Omega Ventura Apollo |
#39
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Quote:
There's a reason Pontiac put 455s in their biggest, heaviest cars rather than 350s. There's a reason why guys who want to go as fast as possible build bigger engines too. If none of that's important, any old engine will do. Heck, you could always put a turbo on that 350.
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---------------------------- '72 Formula 400 Lucerne Blue, Blue Deluxe interior - My first car! '73 Firebird 350/4-speed Black on Black, mix & match. |
#40
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After looking at the photos, you can tell it’s not really a Pontiac.
Wrong color.
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frittering and wasting the hours in an off hand way.... 1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core. |
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