Find yourself a siamese R3 block,Mancini is selling them for under $2600. On another post about race blocks somebody found them going for under $2400. A Rod Bloomer 4.25 crank kit. A set of Indy 360-2 230 cc or 360-1 245 cc heads,Indy intake. A 4.200 bore or larger will put it over 470 CI. With a flat top piston and 65cc chamber you will be at 11.00 to 11.5 CR. With the right cam and .040 or lower quench will run on pump and go mid 9s at your weight with ease. You could probably go cheaper if you can locate a 59* siamese block and use the new Airwolf heads. Remember you will also save the expense of a new tranny if you stay smallblock. I would think you could build an engine like this for $15k or less if you shop around for the right deals and assemble it yourself.