How many of us are there? Owners of Dodge based RV's?

Griff once again thank you so much for all your help with my families soon to be next home on the road. I've often considered the tbi swap. Now down to brass tacks do you think I could pull a throttle body and intake from a mid to late 80's dodge? As well as maybe swap out the tranny for a 518 4 speed from the same vehicle. The only reason I ask is I have a late eitghties b250 with a 318 do you think it will work or is there too many differences in the intake???