Is it wise to push a 7 1/4?

If you weld the spiders...and do it right!...you've eliminated most of the problems associated with that rear. The next weak link is going to be the cap bolt bosses on the pass. side of the ring gear. You could drill them deeper...I'd say 3/4 of an inch, and replace the bolts with longer studs. You could also brace the center of the cap with a nut and bolt through the back cover. Do all that, and I would not hesitate to use that rear in any mid weight, auto trans 12 second car.

Hmm I might just do that then. My uncle is a welder and works on cars alot so he would know how to properly weld the spiders up. The rear also has 2.76 gears in it, so its pretty bad off the line, helps keep it in tact I guess. That and possibly strengthening the bolt cap bosses I should be good to increase its reliability.