1956olds

dose any body out there know the differences between a 303 head '49 - '53 and a 324 head '54 - '56? Valve / port size visual difference? casting numbers date codes? Thanks for the help.

Oldsguy

Norm (88coupe)does he probably just missed this post otherwise he would have replied. I am moving this thread to the "small block" forum to bring it back to the top.

88 coupe

From 49 to 55, not a lot. Small ports and valves. 1.75 intakes and 1,43 exhausts. '56 exhaust was increased to 1.57 and ports were enlarged.

I used '56 heads on my last 324. Well worth the extra effort.

No help. I'm a gearhead, not an "investor".

Norm

1956olds

Thank you for your help.