Cam number ?

MikeD said
I 've done a comp test and lowest is 110 dry, 120 wet, highest is 145 dry, 150 wet, max vac is around 8", the power brakes are poor due to the low vac, car is high geared, stock converter, edelbrock dual plane, edelbrock carb, 1-5/8 headers. I was thinking more than 4 degrees, what's your opinion ? I thought the 73 360 was around 8.5.1 ?
Mick

You have one hole at 145/150, that hole probably is ok, at least ring wise
You have one hole at 110/120. That one needs a valve job.
So with the little info you provided, it looks like you have a 7 cylinder engine.
Now, 145psi was a stretch even when the engine was new, with a 252/260/112 cam. The only reason that engine was not a total dog at 8.0 was because it had 360 cubes.
But as soon as you put a performance cam into it, as a streeter with hiway gears;low-rpm performance disappears.
But you say you have 145psi in at least one hole, and I'm assuming that was the best one,lol. So, I would have to guess that the cam that is in there is pretty close to stock.
And so I think it would be safe to say;

That's your problem right there, your engine is either done, never was, or the cam is 7 sizes too big, bleeding pressure.
Coupled with the boat-anchor hiway gears and stock TC, that poor girl is screaming in pain.
Yeah I know, I sound like an azz. But the truth is staring back at you. Measure the cam, don't waste your time re-timing it. Then do a leakdown test and find out where the pressure is going.

Except now we know it ain't a 7-size too big cam,lol.