I have a 1973 pontiac ventura, I put a 1970 lemans 350 in it with 455 heads a performer rpm cam and intake and a edlbrock carb. i just blew the ring and pinion so ill be putting 373 in it and it already has a posi. the body needs a little work but there isnt any rust. How much do you think i could get out of this. Im wanting to get a ws6 m6