Well, it's my turn to ask for suggestions..

318willrun said
I have not put a vacuum gauge on it because I don't have one."

So spend like??? $28.00 for a top of the line OTC, or equivalent...
Not That fuel is not the issue,
Or Some critter plugged Your exhaust,
Or the cam is poo-poo, however,
I am a simple 'Observer & Reporter' Not a 'theorist'...

Good Holy Racing Gods...
rip the cam & lifters out...

What of the Lifters?, pushrod length?, just on the 'by-n-by' You do know a flat lobe with sealed rings---
will still give an excellent comp reading???? think running compression---

Sorry, I'm out