The first thing to do with any motor of over 20k miles before installing a new Cam is to confirm that the Cam bearings are still usable, as many times they have some good size pot holes in the Bearing surface.
Your heads will be fine and your compression will after the valve job that the shop does be a little under the 9.5 or so that the motor was born with.
Just be sure to change out the valve springs to better handle the lift of the new Cam and have the shop cut all 16 guide tops for Viton type valve seals.
While you have the Cam and Distributor out get and re- assembly the motor with a HD oil pump driveshaft.
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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!
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