Greg needs to figure placement of a-arm pivots and add them to his existing frame rather than add all that extra steel. I don't see why he can't just use the Mendeola A-arms.
Agreed. But why stop there? Everybody and their uncle in the muscle-car world makes a "Mustang II" front end (there's generally not a single Ford part in 'em) using proven geometry, steering racks, etc. and coil-overs. It seems like it would be a lot easier to adapt to a Spyder than the Mendeola front end.
I've often wondered why I couldn't cut the tubes off on a standard beam, weld some plates with pick-up points for the Mustang II stuff, and run a cross bar side to side between the plates (behind the beam mounts). You could hang the rack off that.
I don't know squat about suspension design or I'd probably be able to see the folly of my way-- but still. It seems like everybody wants to adapt something that was an adaptation to start with.