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Discussion Starter #1
The np435 to my knowledge was never offered for an EFI 351, but i have come to learn everything is very interchangeable no matter if carb'd or efi, or motor 300, 302, 351. My swap was 100% bolt in, even my newer tcase linkage bolted up to the older ('86) np435 tailshaft housing, i just had to get parts from a 87-91 and 80-86 matching everything to work with my truck, for example the clutch master is '89 for a 302 and the slave cylinder is for an '86 with a 302, flywheel is for a '86 with a 351, and so on...


1986 np435, got it from the same truck i got the 9" out of at picknpull:



Stock replacement 11" clutch set and stock Flywheel:


Pedals, backing plate, and floorpan:


New starter:


C6 out:


435 in:


reassembly:


BEFORE:


AFTER:


Shift knob:


Its a blast to drive now, geared locked and manual, i just need to swap in the solid dana44 i have laying in the garage :imp
 

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Adding to that, save for the obvious bell differences... add 460 to your interchange numbers...

Did this to my '90 7.5 powered C 350 last fall.

trans is 80 f100 4.9 4x4 t case is my 1356 from behind E40D, bell pac is from carbed 85 2wd F350.

Love it!
 

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Just have to remember to wire up some back up lights,
unless you have the proper wiring harness to the trans.
 

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Discussion Starter #5
Just have to remember to wire up some back up lights,
unless you have the proper wiring harness to the trans.


I spliced the wires from the 435 to the c6 harness so the back up lights work and the neutral safety switch wires are looped together
 

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I know this is a little old but do you have any good pics of the tailshaft coming out of that 435?

I have one on my truck that is bolted to a dana 21 and i have one that is newer that had a 205 on it and i was wondering if they have different tail shafts, splines. etc
 

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Say..I'm converting to a 351w and have a np435..I'm still not 100% clear on what flywheel, pressure plate ect to use?..you used an 11inch..is this what it calls for? or should I match what ever size flywheel my 300 has and get the same size for the 351?..just not sure
 
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