If in your photo that’s truly TDC for number 1 then your Cam is way out of time (by a number of teeth ) When number 1 is at TDC compression ( both lifters for 1 on the heel of the cam) number 6 will be at TDC also, but that will be exh so you will see the exh lifter for number 6 opening .
Your dash 8 heads will only give you at best a 8 to 1 compression, especially if the pistons are the stock ones with a chamfer around there top.
So the earlier heads you have a 1974 head casting off a 350 or 400 would have been a 4X casting.
A head with a 75 casting date off of a 350 or 400 would have been a 5C casting unless it was cast in very late 75 and then it could be a 6X casting .
What is the number they have stamped on them.
Do any of these other heads have screw in rocker studs like your 6X heads do?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
Last edited by steve25; 07-15-2025 at 07:22 AM.
|