Well, if you were spending say $5500 on a big block, and another $1700 for trans and good convertor (both average figures for heavy street/strip stuff) then the $1000 tag really isnt much. If the rear blows on a torqueflite car, with the common valve bodies (not "low band apply") you have to pull the trans and disassemble it just to make sure the thing is ok. Thats $ just in fluid and filter, nevermind your time's value. I tried to upsell a Dana, on the premise of "it's not much more. By the time we were done, they Dana was $3350. That was with large disc brakes, with new axles, the cover, the True Trac, billet yoke, the works. The 8 3/4 could be done for about $2200 with all the same parts, and it's about 2/3s as strong as a Dana. Big tires, hard launches, and heavy (meaning 3000lbs+) cars break 8 3/4s. You wont break the Dana. As I said, include every nut and bolt to get the things in and functioning. Only then does it really come into a clear picture. Building a car that will race, that is not limited by rules, go with the Dana...