I read some posts about how it is difficult to convert NOS LS1 (or LS6) systems to a LT1 system. Does the same hold true for the reverse?

 

If it's the dry kit it's much easier to adapt to ls1/ls6, as your discarding parts more than adding. You could sell your extra parts to the guys that want to put the 5177 on an lt1 ( or go back some post and trade the guys with the 5177s). Go to sticky above and I believe there is a 5177 install manual and you can see what you don't need.

 

Good because I think I bought a used kit for the LT1