Posted by Greg Coffin [67.176.56.44] on Saturday, September 19, 2015 at 10:09:09 :
In Reply to: Replace NP 420 with NP 435? posted by cdm [72.92.137.125] on Saturday, September 19, 2015 at 08:01:47 :
If your talking about a WM300 style Power Wagon - no, but there are V8 and slant 6 bellhousings that will accept both transmissions. Also, a 420 for a WM300 has a different input shaft and bearing retainer than a 435. I think the 435 retainer is larger, so a WM300 bellhousing can be modified to accept a 435, but there's other work that has to happen too. Dave Cirillo's website has more info, and I'm sure others will chime in.