Another 440 duster need some help

Hello,I'm new to the forums ,but not to mopars,just a-bodys(always had e-bodies).I have a 73 duster that I'm considering putting a 440 in.First off ,mine has power brakes,which I would like to convert to manual ,to have more room.Do I just need a differant master cyl? The 440 I have is from a 1977 Dodge van/motorhome.The crank is a 6 bolt. The heads are 452s.Since the motor had the van body,I should have the (normal) block correct? I'm just planning on porting/polishing the 452s,using a hemigrind or maybe the 509 cam ,with a torker intake (have 1 lying around) and an holley 800 or 850 double pumper.I'm thinking schumacher mounts ,but not sure which headers,I don't really want to cut up the fender wells,but I will if thats whats best,ANY HELP ADVICE PLEASE!! on what stuff to use .Or should I just buy the 408 small block stroker?????????( I sure like BBs better though) Thankyou in advance!!:read2: