360 Cylinder P.S.I.

I have 120psi on all mine, goes over 150 if squirt oil in cylinders beforehand. If all cylinders are low - how about a severely stretched timing chain?? Anyone. I know if you
put the timing chain in advanced it will increase compression some.

Think you can pull off the distibutor cap and manually crank motor back and forth to check for that.(Just throwing something out there)