So I have a bone-stock 57 with a 283/2bbl/P-G right now and the engine is getting pretty tired. I have a 57 283 powerpack long block getting rebuilt right now to eventually replace it. My original plan was to source a 4bbl carb/intake/air cleaner and go with dual exhausts to complete the PP setup, but I'm also considering a Sniper 2GC EFI unit instead. With the PP heads and dual exhaust, I am thinking the performance would be pretty similar and it would probably make for a much nicer driving car overall (albeit a little more expensive). Just curious what other's thoughts are and if anyone has done something similar. I am also curious if there is a ported vacuum source on the Sniper unit for the distributor vac advance (not interested in going electronic there). Thanks!