hey beef...i'm no BBC expert, but from memory if you have a SBC/TH400 in it, then all you need do is make sure you have an extra 2 inches clearance between the fan & the radiator (with SBC fitted) and the BBC should fit. My guess is, a little more if you have a long water pump on your SBC.
If you use the same box, then you use the same engine/gearbox mounts. side clearance should be ok, but maybe tight near the steering shaft. that a help?
hope so,
cheers
peter
