what are the options for transmissions on a 390? we have a 390 sitting in a truck we are planning on putting back together with a 351. we have a early 80's 3/4 ton truck and transmission that was a 400 but the guy we bought it from blew the engine. would it be possible to take the 390 and bolt it up to the 400 transmission.... the trans we have for the 390 is a 2wd and need a 4x4 we don't have a use for a 2wd..... all farm use.
im a diesel guy and don't know much about the gassers
The 390 is the FE series and will not bolt up to a 400 or any of the 351 motors. (C, W, M--M is same as the 400 for bell pattern)
If you are only going to use it for farm work, find a C6 4x4 trans in the FE pattern. Millions served, so you should be able to find one from late '60s to '76 truck.
If you are talking manual trans, then a 4 speed truck trans will bolt to the 390 with the correct truck bell. Again, lots of those out there, 352, 360, 390, any one will do as long as it is '66 or newer.