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#1
06-03-2022, 06:32 PM
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Numbers matching?
Had someone look at my 70 455HO car and tell me it's all wrong, wrong heads (64) wrong exhaust (RA style not logs) and numbers didn't match VIN I know the heads and exh are correct. You tell me if i'm getting paranoid
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#2
06-03-2022, 06:35 PM
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64s are correct for a 70 455?Tom
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#3
06-03-2022, 08:53 PM
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64's would be heads for 455 in A-body.
Not sure on the exhaust manifolds. Is the engine code a YC? What is the date code on block and date on cowl tag? 
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#4
06-03-2022, 09:04 PM
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Exhaust manifolds were log type even with RA.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#5
06-03-2022, 11:04 PM
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64 would be correct for a 70 455 HO. 15 is correct for a 70 455 non HO. RA manifolds weren't available on 70 gto with the 455. Why? That I don't know. I put them on my car anyways. Looks the dash vin matches block vin. 3 looks somewhat like a 8 but I think it's all good.
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72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007 (cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD 1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.64 @ 87.3 mph on slippery street tires.Bad 2.25 60ft.Owned since 86' Last edited by scott70; 06-03-2022 at 11:10 PM. |
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#6
06-03-2022, 11:41 PM
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Johnta1 Block is YA
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#7
06-04-2022, 03:40 AM
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That VIN stamping looks bogus.
ALL the 1970 blocks we've ever played with - and that's at least forty of them - were gang-stamped. That one is definitely NOT.
We've never seen a factory-installed block that was stamped like that one is stamped. Ever. Because of the 'wrong' look of that stamping, I'd be fairly confident that THAT block is NOT the original block to your car. As mentioned, none of the 455s in 1970 got factory headers - they all got log manifolds. If I had to speculate, it would be that the original engine in your car expired at some point in such a way that it could not be repaired, so someone swapped in a big car block and re-used the original '64' heads but upgraded the exhaust manifolds. Does it still have the stock intake, carburetor, distributor, etc. ? Block casting number 9799140 or 485428 ? And how does the block date code compare to the head date codes and the actual build date ? The evidence suggests that whoever told you that it was 'matching numbers' was not being honest..... |
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#8
06-04-2022, 08:51 AM
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Quote:
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#9
06-04-2022, 12:58 PM
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To ease confusion, YA is a GTO 455 HO block on the early GTO's
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#10
06-04-2022, 01:17 PM
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THAT is what the partial VIN stamp SHOULD look like.
Quote:
Mike's YA block was very obviously hand stamped by someone. In the Corvette world, that would be described as a 'forced match'. Hopefully the YA block is at least a 9799140 casting. |
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#11
06-04-2022, 03:39 PM
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Block is a 140 cast Date: I089
Head : I099 couldn't get to the other one Intake : I129 Note: This car was ordered by the GM comptroller and delivered to his house not a dealership |
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#12
06-04-2022, 04:15 PM
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Build Sheet
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#13
06-04-2022, 07:38 PM
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LOL, the days when an AM/FM stereo was more than double $$ of HO option.!
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#14
06-04-2022, 08:25 PM
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Quote:
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#15
06-06-2022, 01:33 PM
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Quote:
Scrape all the paint off around there and you will see the answer, either you will see the original VIN stamp covered over and or evidence that the surface is ground down or remachined without the factory looking milling marks.
__________________
My Break Away Squad 1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops) 1969 LeMans (2dr & 4dr Hardtop and a Cvt) 1969 LeMans Safari 2 seat Wagon 1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop) 1969 Catalina (3 Cvt’s & a 2dr hardtop) 1969 Ventura 2 Seat Wagon 1969 Executive 4dr Sedan 1969 Bonnie Cvt 1969 Bonnie 3 Seat Wagon (2 of them) 1969 Bonnie Brougham (4dr Hardtop & Cvt) 1969 Grand Prix SJ (2 of them) 1969 2+2 2dr Hardtop (Canadian model) |
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#16
06-06-2022, 04:09 PM
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It always amazes me how re-stampers don't even make an attempt to make the stamp look authentic.
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69 Judge, SURVIVOR, Carousel Red/Parchment, RAIII, 4-sp, 63k orig. miles, unrestored, #'s match 65 GTO, SURVIVOR, Tri-Power, 4-sp, 79k orig. miles, Capri Gold, orig. paint, top, interior, #'s match 70 GTO Conv, 400, at, A/C, Atoll Blue/Sandlewood/White top, all #'s match 2015 Challenger R/T Plus, hemi, Sublime |
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#17
06-07-2022, 05:12 PM
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True.
Quote:
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