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#41
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#42
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#43
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You can use the low compression to your advantage later when you get the car solid, add a Torque Storm SC.
You can make back all the lost hp and tq from that era real fast and the cheapest way possible vs new engine etc.
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69 GTO Convertible, 4000lbs 462ci, 606tq/569hp - 93 oct @ 34 deg (207psi) 11.7:1, KRE H Ports, Lunati HR 282/290 w Johnson Lifters & 1.65 Scorp, E30, EFI, Holley HP + Dual Sync, 12-1 Crank Trig, 120lb Inj & 1000cfm TB, Torker II EFI Int & Rails, PTC 10", Ricks SS Gas Tank, Magna 4303, Aerom EFI Reg, Aero Front & Wilwood Rear Disc Brakes, Dougs 1 7/8" & Borla Pro XS 3", Alum Rad & Dual Fans, 12:1 Box, UMI Arms & Viking Berz Fr + Rear CO Shocks, Hella UP28 Vac Pump, 12 Bolt, 3.73, 33 Spline |
#44
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The 72 intake eliminated the EGR presence from the car.
The exhaust sounds ideal with RA manifolds and true duals going to a transverse muffler. At least ideal for clearance and better performance over stock 75 stuff. That's exactly what I would want on it. I'd check the axle ratio. An economy axle downgrade might not show up on invoice. Or an owner might have swapped for better highway use. The shaker screen would be a quick get by until you do the functional flapper. But opening it up one way or another should prove noticeable with the exhaust and rocker arm upgrades. My 79 4spd had similar upgrades with cam and exhaust , all emission controls removed or disabled. Except it still had stock log exhaust manifolds and was 3.23 gears |
#45
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Here are a couple pics from a 73 currently on BaT.
This is how my 73 shaker looked with the provision for 3 bolts/screws for the removable block-off plate. I never owned a 74 75 76 so I don't know if those shakers had this built in provision or not. So far it sounds like , not. |
#46
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Get a set of 5c heads from a 350 CI engine assuming you have a 400. These are great heads and will up your compression and should be cheap to purchase. They were available in 1975. Call butlerperformance.com for a cam and lifter set. Go with a 355 rear gear. You should feel a difference in the driving seat and still have gas money left.
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#47
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A 6X head casting with the -4 stamped on one of the exh side vertical bosses has the same size chamber as the low production ( California) 5C head.
__________________
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! |
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