70 LT1 heads casting numbers.

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May 7, 2007 | 09:38 PM

L Holmes

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Racer

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70 LT1 heads casting numbers.

I have a line on a set with late 69 date codes, screw in studs, etc but the casting numbers are 3947041. I have seen "186" and 441 casting numbers listed for these cars. Anyone ever seen this casting number on any legit 70 LT1 motors?

May 7, 2007 | 09:44 PM

Mikes*Corvettes

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From: London

3947041 used on 69, 300 Horsepower 350 Cubic-Inch Engine

May 7, 2007 | 10:16 PM

rihwoods

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1970 (Corvette Black Book) :

Head: 3927186:350 ci,300 hp;350 hp;370 hp...
3927187:350ci;350 hp...3973414:350 ci:370 hp...

Rich

May 7, 2007 | 10:35 PM

L Holmes

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Racer

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Yeah thanks, I have seen all of those casting numbers and info. Im just wondering why a set of heads that were supposedly built for a 350 300hp motor would have 2.02 valves & screw in studs & guide plates? Shouldnt should it? 350 300's used 1.94 valve heads.

May 8, 2007 | 09:08 AM

Easy Mike

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From: Southbound

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Quote:

Originally Posted by L Holmes

...Im just wondering why a set of heads that were supposedly built for a 350 300hp motor would have 2.02 valves & screw in studs & guide plates?...

Reworked by a previous owner. The stock heads on my 327/300 do not have guide plates, but I added the screw in studs.

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