I've got a 77 350 and i would like to change the heads to the earlier small chamber heads. Which heads do i want, were do i find them, and how much should i expect to spend? I don't want aftermarket heads. Thanks MIKE

 

Where are you located???

#4,5,6,7,7a's would do what you ask, but they will have to be drilled to 17/32nd's for your larger 1/2 inch head bolt holes.

Figure bare castings at $100.
Shipping could be anywhere from $50-$100 depending where you live.
Drilling the bolt holes $25-$50 depending on the shop.
Get a valve job, no matter what.

I have 3 sets of 7a heads that I am willing to part with, but I'd rather do local pickup on these.
Jim in Phx.

 

Thanks for the info. Shipping from you to me may be costly, I'll try and see if i can find some closer.

 

Two more question, how hard are these heads to find and how do i identify them? Thanks

 

The "#" will be to the left side of the #1 spark plug (or #8 plug).
#4's will have casting #394497 above the center exhaust outlets
#5's all -397742 above the center exhaust outlets
#6's all-403859 " "
#7's all-409147 " "
Check with core suppliers in your area.
Most machine shops know them, but will NOT give that information (or their phone #'s) out to customers.
Anything from a core supplier MUST be fully rebuilt. That means they will need EVERYTHING.
Jim in Phx.