Dave,
As far as I know the swap should be a direct swap. The FPM shows both transmissions using the same front bearing retainer, bearing and seal, clutch release bearing, clutch disc, etc.
Keep in mind this is for 69-71.

Ma Mopar changed the part numbers for the clutch and the front bearing retainer for 69-71 on the 435 vs the 67-68.

They also used a one piece ball bearing up to serial number 166800 [production start 1967] and a tapered roller bearing after 166800 on the input shaft. so, there could be some differences for the earlier ones vs the later???

From what I can decipher in the FPM there were:
five basic NP 435's:
1). Early 61-67 NP 435 close ratio with ball bearing input shaft.
2). 67-68 NP 435 close ratio with tapered bearing input shaft.
3). 67-68 NP 435 wide ratio with tapered bearing input shaft.
4). 1969 NP 435 close ratio.
5). 70-71 NP 435 wide ratio.

70-71 NP 445 replaced the close ratio 435 and was full synchro.

If your truck is a 78, seems like it would be a drop in deal.....

I'm sure some of the other guy's should chime in if I'm wrong.

Mark D.

1968 W200 Sweptline
1969 D100 Utiline
1971 D100 SE Sweptline
1993 D250 Club Cab Sweptline
1986 W250 Cab & Chassis
1978 D300 Sweptline

E. Brookfield, Massachusetts



Edited 1 time(s). Last edit at 10/19/2015 11:16PM by swptln.