I have a '73 fj40 w/ a 350 and a 3 speed transmission and transfer. If I go to a '79 4 speed and transfer, will it bolt right with the same adapters that I have now? I have a gm bellhousing with a spacer between it and the transmission and a crossmember bolted to the transfer. Wouldn't the higher gear of the 4 speed transfer make the 1:1 4th gear better on the road than my 3 speed? Please help