Hello guys anybody have any recommendations for a 4 speed 4x4 transmission that will fit a 351m? I'm trying to find one for my 1974 Ford. Thanks guys!

 

New Process 435 or a T-18 should fit easy enough and the NP-435 is a very common transmission.

NP435 = aluminum top cover w/8 bolts
T-18 = cast iron top cover w/6 bolts
Warranty Plate TRANS code:*A*= NP435 (N-1965 only) /*F*= Warner T-18 /*P*= F350 Warner T-19.
Warner shift lever retainer cap (8MTH-7220) threads on/off.
NP435 shift lever retainer cap (B8T-7220-D) has two notches, is retained to shift tower by two pins.
To remove this cap, it must be*pressed*down*and*held*down*while turning it counter clock wise to remove it. (Its spring loaded and twists into place, we removed one and it was a 2 person job. Put the trans into 2nd, 4th, or reverse, then one person holds the cap and applies pressure, twisting in a counter clockwise direction. The other person hits it from the top with a hammer to get the cap to go in below the two clips that hold it in.) People unaware use pliers or channel locks to remove it, which tears out the pins.
Originally NP435: Reverse-down towards the seat while Warner T-18: Reverse-up towards the dash.
The reverse shift pattern was changed circa 1973, but I can't recall for which of these 4 speeds. ( I believe it the NP435)
Note:*There's another 4 speed: RUG SR-OD Single Rail 4 Speed Overdrive introduced in 1978 F100/150 300/302, TRANS code*B

The 400 uses a 12" clutch and the 351m uses a 11"
D7TZ-6375-D*.. 400 Flywheel-Use with 12" clutch.
D7TZ-6375-E*.. 351M Flywheel-Use with 11" clutch.*

 

NP 435 is very common....There is one on my local Craigslist which has been on there for months........including the adapter between the tranny and T case for $100

 

Thanks for the info guys, I will look into it.