I chose not to use a chevy motor in mine. Not going to have a/c either so I just took 4 inches out of the firewall for ventilation and to make room for the powerplant!
'33 Plymouth 5 Window Coupe Blown Aluminum HEMI w/bolt ons (under construction)
'69 Chrysler 300 Convertible 375 HP 440
'71 Plymouth Duster 360 W/EFI (Wife's Ride)
'12 Ram MegaCab Dually 6.7 Cummins