well, i'm getting ready to build my bottom end and i'm having problems choosing what set up to run. just wondering what would be a better choice to go with? i'm thinking either a production block and a 331 or a 351(357) or maybe even a 393. i'm trying to do this with a cheap budget in mind but I want good enough parts it will last. the parts I have are a brand new set of AFR 185's, procharger D1 w/ 3 core innercooler, trick flow track heat R intake, bbk 75mm t/b, steeda 19 cam and 1.7 rr. i'm looking to make 550 at the wheels. what do you guys think?