ok so i found a decent deal on a tremec 3550 trans and pro 5.0 shifter. comes with small block ford bell housing. guy said he had it in a 1990 mustang gt. my t5 trans is shot in 2nd and 3rd gear so i was going to buy this and bolt it to a built 306 and put it in MY 1990 gt. i was just wandering if its worth it and what all i will need to bolt it in my car because the owner of the trans is trying to tell me its a direct bolt up but i would think the drive shaft would need custom made and clutch would be different and wat about the cross member? please help me before i go wasting hard earned cash on this!!!