Cruise Seems Lean

@71GSSDemon Why would you want to put primary blocks on the secondary side of this setup?
Honestly. I think you need to focus on one thing at a time. Get a non-leaking radiator in there and a fresh set of plugs. See how it runs. Then go from there.

While waiting for the parts you can go back and read some of the stuff posted earlier. The answers about to most of what you're asking is there. As Tuner would say, some assembly required.