Want to buy 87 NA RX-7 Diff with short gear ratio

HI I am new on this fourm. I am currenly building a SCCA ITE RX-7(13BPP) but beside the Engine, wheel and Spoiler. It is prety much a ITS CAR. However I am still use Stock MT and DIFF(4.1 final drive) from TII. so even thought my car do pretty well on those hight speed "no lift corner" but it react very slowly on slow speed corner. and for most of time I am only using 3 gear on front straigh way. so I was wonder did any of you guys have a Spare NA DIFF with short final drive(4.8 or 5.1) for sell? please let me know
thanks for ur time
http://www.teamfc3s.org/forum/member...hp?img_id=7663

[This message has been edited by Devil-fc (edited November 18, 2004).]