Swap 3.8 with 4.3 - Possible?

[Joe2go]

Does anyone know if I can swap out a GM 3.8 for a GM 4.3?

 

[achris]

If it's a complete engine swap, yes. If it's a block swap, where you build the rest of the engine from the 3.8 accessories, no.

 

[Scott Danforth]

Does anyone know if I can swap out a GM 3.8 for a GM 4.3?

depends.

what drive

if its an OMC stringer drive, then you are SOL on a 4.3 unless its a 1985 only 4.3 with a 2-piece RMS crank as there are no couplings available for the stringer drive and a 1-piece RMS crank. if you find the ford coupling you should be able to have the OD and pilot and bolt pattern re-machined

if its a mercruiser, then no problem if you follow Chris's comment.