The obvious choice is the Revell 68 Firebird kit, but those are in the area of $50.00. Seems excessive (even for me) to pay that much for just an engine. So I'm left with choices from various MPC kits or the 421 from the AMT 62 Catalina. I could use the 421 but find some updated valve covers and a single 4bbl intake for it. Although I could just plop that 572 Chevy resin engine in it and call it a day :-)
Decisions, decisions, decisions!