head numbers

[dukeboy_318]

can somebody decode these small block head numbers,----- 0734 and 2843675 thanks

[dukeboy_318]

nevermind answered my own question there are 318 heads but theyve had bigger valves put in?? 

[firefighter3516]

my book says it is a 318 68-74 1.78 intake valve 1.50 exhaust 60cc non adj rocker arms. Hope this is what you needed.

[dukeboy_318]

measured mine at 2.08 and 1.78 respectively

[firefighter3516]

Well that is good if they are bigger. Just going what the book says but it does say that it is just a referance and could be machined differently.

Joey