I have a 1979 jimmy blazer, T350/203...........
Im going to swap out the 350/203 and put on the 465/205, This is my daily driver. So I just want to make sure I have all the stuff and info before I start.
I have swaped a 350/205 to a 465/205 on my last rig no problems, but now I have this 350/203 combo. Will this fit the same...? crossmember, will this line up the same...? and the drive lines will these also be the same...? or any other info out there I should know before I start this swap...? John

A 203 is longer than a 205 i dont think the shafts will work.

the cross meber will land in the exact same spot, use the exact same mounts, the exact same hole in the floor, but like said above, you shafts will not work, your rear will need to be 4" longer.