http://cgi.ebay.com/ebaymotors/53K-2...item1e5a4150c2
http://cgi.ebay.com/ebaymotors/2003-...item3359c716ed
http://cgi.ebay.com/ebaymotors/02-Tr...item53df6a034f
what is cheap???
a 6.0 with l92 heads and a cam makes close to 600 horses,
i would stay away from the big block, unless you intend to keep it a BBC powered car.. you are goung to need all kinds of stuff for that motor... accessories, alt, wp, ps-pump, air?? pullies, covers, oilpan, ballancer, furlpump, headers, motormounts, throttle related stuff, carb, aircleaner and so on...
none of wich will work with the LS engine, and will never sell for what you spend on it...
a 5.3 sells routinely for arround 1000 dollars in ebay, add a cam and your making 400 easy... and it comes with all the aforementioned stuff... (except for longtube headers and aircleaner)
and you mentioned auto-x you do realize it involves turning right?? a BBC weighs 600 pounds with iron heads oil and water.. an alluminum block ls weighs closer to half that.. and its weight where it matters the most, roght over the front wheels....
the ls1/t56 dropout can be yours for under 4k .. INCLUDING transmission... add heads and a cam and your making close to 500 rwhp.. you cant touch that with a budget BBC.. trust me i know first hand, everything costs twice as much for a big block...
cnc ported ls1 heads, under 2 grand.. same for a BBC, closer to 3500 and so on