69 corvette L36 engine cylinder heads

[Terry M.]

Re: 69 corvette L36 engine cylinder heads

Terry and Mark-----

It has to be 1969 (or, 1970). The 3964290 cylinder heads were not being produced as early as October, 1968. I have no doubt these heads are original to the car.

Joe
Thanks for the reinforcement of my guess.

[Don W.]

Re: 69 corvette L36 engine cylinder heads

I also have a Nov 69 build and I believe I have 70 454 heads.

Right side head GM8T; J 25 9 (= Oct 25, 1969); 3964290; PASS

Left side head 3964290; GM10T; J 23 9 (= Oct 23, 1969); PASS

[Mark B.]

Re: 69 corvette L36 engine cylinder heads

Thanks Don, Mine was J22 p on driver side which was a day before yours. I haven't pulled the passengers side yet

Thank for the explanation

mark

[Gary B.]

Re: 69 corvette L36 engine cylinder heads

I have updated the 68-69 TIM&JG with this information. If and when the 6th Edition ever gets published, it will be in the new manual.

Gary Bosselman

[Mark B.]

Re: 69 corvette L36 engine cylinder heads

Gary, thanks

[Rick N.]

Re: 69 corvette L36 engine cylinder heads

3931063 cylinder heads were casted through the entire 1969 model year.

If 290's could've been on later 69's is it possible 063's would've made their way on early 1970 LS5's ?