Just a little note on your add that i saw forget the 377 (350/400crank)build yourself a 30 or 60 over 350 w 3 9/16 storker 6in.rod you will not have to notch the block,hitting the cam plus you crank it up 8000 all day and have just has much tork.enginekits.com sell one for less than $300.00 make sure you have the rotating assm. balanced. you need a piston with a compression heigth of 1.519 w/5.7 rod or 1.219 w/6.0 rod. this will be a 383 w/a60 over block.that'a 3.562 crank with a gain of 0.082 over stock.if your going spend money on spacers get a 400,block speedpro and com cams sell spacers that fit it for a 350 journals put in a 267 crank 3.10 stroke w/a30 over you'll have a 336ci.w/4.1555 bore thats what super stock cars use with a weight to cubic in ,rules