Besides that, and I hope I don’t offend any owners of these cars here, but Fords and non nail head Buicks ( V8s ) and AMCs have the worst valve jobs and or castings.
Not that they don’t seal but they have sunken sharp rideges and under cuts and castings that either have very bad core shift or bad castings period!
Zoom in on the picture of the rusty Ford 460 head I posted and look at the under cut below the main 45 degree seat of the intake valve, and then there’s the chamber lip above the intake valve so this Ford head already started off life with a sunken seat which is something you want to avoid at all cost with intake valves.
Next look at the Buick head and the huge lip running around under the main seat of the intake valve.
Even on aftermarket heads there can be terrible transitions from the top of the valve job to the chamber.
On the Edelbrock big port Rpm heads for BBM motors they have a bad lip above the intake valve.
Sorry that I don’t have a photo.
The brand that hands down makes you shake your head in flat out disbelief are AMC V8 heads.
The last set I did I spent 30 minutes on EACH valve just hand blending out the ridges left by the machining of the valve job
You never find the kinda crap on a Pontiac head thank God.
__________________
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; 04-07-2024 at 07:35 AM.
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