my boys got one in a 93 hatch with a moon roof seems to hold up just fine with the 460 in it,and they make a bell housing conversion kit so you can put a T5 on the 460 if you want a stick(im sure you can use other manual tranys with the conversion), he's running a c6 now but were thinking about doing a c4 there lighter....you'll need some custom motor mounts to fit the 460 in the Fox and custom headers we used 3 pcs hookers to get the clearance plus you have to put the trans in on the ground first and then drop in the motor in and bolt it to the mounts then line the trans and put the headers through at the same time (damn long tubes) headers are the bitch out of it all

but it might be a diffrent install on your car seems like you have it cut up and welded so you might not have to much of an issue squeezing it in we tried to leave it as stock as possible lol
p.s -we thought about the stick conversion too BBF banging gears =bad ass