this may sound simple to some of you 'old hands'- i just want to avoid the problems you may have encountered.maybe i can benefit from your busted knuckles. i want to drop a chevy 350 into my '53 bel air. tell me how. will i have adequate firewall clearance?, do my fresh air intakes have to go? i have a 700r4 i'd like to use. should i clip the frame? that would improve steering&handling i would think. can i use my '53 r/end? how about springs? any advice or 'vignettes' would help.