my 1969 mustang used to be a 6cyl and still has the 6cyl rearend but i want to swap to a v8 rearend what size should i use and what cars can i pull it from im heading to the junk yard this weekend just wondering what i can pull one from.

 

go 9"

here's all the rear links in the FAQ

8 inch or 9 inch rear end?
http://www.ridgenet.net/~biesiade/Fordrears.html
http://mustangandfords.com/techartic...ff/index1.html
http://dfwmotorsport.com/Fairlane/9inchrearends.htm
http://www.maliburacing.com/ford_9_i..._nine_inch.htm

Rear end information:
http://www.hotrod.com/techarticles/48618/

 

even chevy and dodge guys in nascar use for 9" rears....they are the best....an 8" would prob do fine too if u found one cheap and wernt going for massive amounts of horsepower.....

 

My 67 has an 8" and it works great. If i had my preference, I would go with a 9" - more gear options.