Got a couple of issues after getting this buttoned up:
1) No compression in any cylinder. I'm hoping I tightened up the rocker arms too much thus not allowing any of the valves to fully close. I followed the procedure in the Haynes manual and confirmed by the 1A Auto head gasket video (TDC #1 compression, do half of the valves then rotate the crank 360 and do the other half). For each instance I rotated the push rod with my fingers while tightening until I couldn't rotate it anymore and then added a full turn.
Thoughts/guidance on this for my second attempt?
2) When the fuel pump primes I'm reading about 60 PSI via the test port. However after it stops priming the pressure drops off considerably. While cranking it's in the 40's. From what I gather on the Vortec's that's not proper.
Based on the advice I saw via another thread I replaced the fuel pressure regulator on the spider while I had the manifold out with
GM GENUINE 19210686. However that part didn't match with what I took out, and at the time I assumed it didn't matter as it was an updated part or similar. After looking at the parts available on RA this part matches visually with what I took out -
ACDELCO 2172251. Both are listed as fitting my application on RA and other interchanges (perhaps they all pull from the same source I'm not sure).
So, did I get the wrong part or do I potentially have a bad regulator out of the box? I'm aware it could be a bad check valve back at the fuel pump area, just seems odd that I have an issue like this after replacing that regulator.
Appreciate the help everyone.