Heads
#1
Heads
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
#2
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.
#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.
#5
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.
#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.
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December 7th, 2020 06:43 AM