hey there i have been working on my 1970 ply duster that i have set up for a pro touring style three link and watts link set up, i am also in the stages of building a fab 9 for it, i have a few ?s though my engine of choice will either be a 440 or 383 bb set up for boost, question number one is are these motors identical from the outside for the most part ? Question 2 is there any modification that has to be done to the fire wall and tranny tunnel to fiit a bb and 4 speed trans in an original 225 slant six three. Speed on the floor car ?i will be building custom floors, fire wall and tunnel just need to know wether i can build it closer to my stock pieces, if mods are required ill have to go find a block and trans for mock up but if not i should be good, thanks a lot guys
