Need help with 1975 Duster /6 to 440 conversion

also on my to add list is drill holes in the passenger fender to get to the middle spark plugs. Real PIA in the 74 dart
Big pain in a 68 fastback w/ raised port heads too. Got the hole on the pass side will eventually cut the drivers side like u suggested !
No.7 is right behind the steering column , got to be real careful w/ that one /alum. heads.