... You need the crossmember between the spring mounts on a straight axle truck. You don't need it on an IFS truck unless you are mounting engine/trans there.
The IFS donor is a '72 Chevy C20. It did not have any crossmembers or boxing between the IFS and the transmission crossmember. Since the frames are similar in design between the crossmembers and I'm using similar power train I believe I'm okay with this approach. (The C20 was a 402 with TH400.)
I have thought through a couple of approaches to creating k- or x-members through this area, and once I'm putting the trans crossmember in place I'll make a decision on that.
Sounds like a plan, I agree that the crossmember is less important without leaf springs, keep forgetting you won't have any up front...
But even so it is a long way from the front "axle" back to the crossmember at the back of the cab, some sort of crossmember in there may be a good idea?
Grigg
