500-472 caddy installation question?

[1bad chevy]

well it's in ther run's sweet. there no vibration, no noise. and it fit's sweet no oil filter issue's no fan issue's, as i said before the only modification down was for the motor mounts.now to all that have done this what cfm carb are you running i believe the 750 edelbrock is starving it for fuel here's some pic's. oh yea changed the grill and fender's to a 69 nose do you like it ? one other question i got this out of another truck someone put a rear sump pan and pickup tube on her from a 425 is there a check valve or something in there to keep the pump primed having an issue with cold start's no oil pressure for first 5 sec's or so after that it's up to 40-50 pounds and stay's good the of the time any idea's yes it's a new oil pump