Wouldnt hurt. You can have good compression w/incorrect timing though.

 

Just at wrong time. An advanced distributor never cured,,,

 

Dont know if my post are even going through now,,ill get back to you

 

worn valves or rings for me.

 

I put on new coil, pertronix electronic igniton, and new plug wires. I checked TDC on the number one cylinder and the mark is correct. Runs much better. I set the timing and tuned it up (5 degress above TDC, idle at 550rpm), but when I give it a little rev, it stays at 2000rpm for a few seconds, before slowly dropping down to about 1000 rpm. I recheck the timing and it jumped up to 20 degrees above TDC. I also put a fuel pressure gauge on it. It reads 3.5 psi at 1000rpm and 3.5 to 4 psi at 2000rpm. Is my pump bad?

 

Just did a vacuum test off the carb. 10 inches at 1000rpm and 15 inches at 2000rpm. I think that is about right. I also think that eliminates a misaligned timing chain as the problem.
[/align]

 

I just did a compression test.
1. 115psi
2. 105psi
3. 105psi
4. 105psi
I don't know what these numbers are supposed to be, but they are all pretty even.