There is no way to get away from the smaller 7.25"/8"/9" clutch package with anything other than a GM V8 engine.
Weddle now makes a billet adapter that allows the use of an Albins VW style bell housing on the S4D/S5D transaxle, which will then be used to mate to whatever non-GM V8 engine you want to use. It is essentially a VW bell housing sandwiched between 2 adapter plates. This does use the internal Weddle/Albins style hydraulic slave cylinder.