Question: is the GM/SBC NV4500 the same thing as the cummins NV4500? So could this adapter assist with a 5-speed V-8 swap as well? I'm pretty sure I knew the answer to this question back in my 60 days... 
ARCHIVE Wits' End- If turbo isn't for you, what about going diesel? (1 Viewer)
- Thread starter NLXTACY
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Will Van
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Question: is the GM/SBC NV4500 the same thing as the cummins NV4500? So could this adapter assist with a 5-speed V-8 swap as well? I'm pretty sure I knew the answer to this question back in my 60 days...
It is basically the same transmission. The GM and Dodge have different bell-housings and tail housings, and differently sized input and output shafts. But in theory, yes, you could use this adapter plate for a GM swap. You would need a GM bellhousing and input shaft, with a Dodge 4WD tailhousing, and the Wits' End machined 2WD output shaft to work with the Toyota transfer case. That shouldn't be that big of a deal since you have to rebuild the NV4500 anyway to install the Wits' End output shaft.
Hope this helps.
Will Van
GOLD Star
Also, more info here: The Novak Guide to the NV4500 Transmission
Evidently only the 1993 - 1994 GM NV4500's had the different bellhousing, but the input shaft is different either way.
Evidently only the 1993 - 1994 GM NV4500's had the different bellhousing, but the input shaft is different either way.
inkpot
SILVER Star
Wasnt the Dodge the one that had synchros on first gear, at least for a few of the earlier years?
Will Van
GOLD Star
All forward drive gears were fully synchronized on both Dodge and GM. The early Dodge NV4500s offered synchronized reverse.
Early GM models also had a lower 6.34 first gear. The GM input shaft from a 6.34:1 early transmission will not fit the Dodge transmissions.
NV4500 Transmission | Advance Adapters
Short answer is "not correctly". Folks have successfully registered their trucks with these in them, but any engine swap in CA is supposed to go through the CA BAR for inspection and stickering. The law states the engine has to come from the same "class" of vehicle. The 6bt only ever came in vehicles designated as medium or heavy duty. CA defines the '80 as a light duty vehicle.
This is as of right now, no idea what the case will be tomorrow. This also doesnt prevent you from buying an out-of-state truck (not in CA's system) converting it and getting it retitled in the other state and THEN importing it via the DMV or AAA.
NLXTACY
Wits' End
- Thread starter
- #87
I’ve discussed this with the SEMA shop. It’s doable on my side by developing an engine swap kit and getting that CARB certified. All doable but I am definitely NOT the one to do it. I’ve spent so much time and money on the 1FZ turbo that I don’t see myself doing it again for these.
mudgudgeon
Resident galah
The stock air box is the choke point with a decent turbo upgrade on a HD-T etc
Will Van
GOLD Star
What is the SEMA shop? Is that a fabrication shop? I thought SEMA was an event?
Interesting. I wonder if a Tundra box would flow enough. Who knows if it would fit.
RFB
97 FZJ80 LIFTED SC DUAL BATTERIES,37s
mine too sideways backwards almost upside down all good baby
NLXTACY
Wits' End
- Thread starter
- #94
Here you go folks. I have a couple things to still gather but otherwise everything will be ready to go by next week. Just threw it up on the site and I am now INCLUDING all of the necessary hardware and some Loctite 
absolute-wits-end.com
Engine Conversion Kit- Dodge NV4500 to Toyota HF-2A
Engine Conversion Kit- Dodge NV4500 to Toyota HF-2A (ECK-1)
Dear Santa...
Will Van
GOLD Star
Here you go folks. I have a couple things to still gather but otherwise everything will be ready to go by next week. Just threw it up on the site and I am now INCLUDING all of the necessary hardware and some Loctite
Engine Conversion Kit- Dodge NV4500 to Toyota HF-2A
Engine Conversion Kit- Dodge NV4500 to Toyota HF-2A (ECK-1)
View attachment 1943449
Boom!!! Ordered and paid!
I really appreciate you tackling this project, Joey. It’s so nice to have a vendor that develops high quality products (and actually delivers them)!
Will Van
GOLD Star
They have nearly identical dimensions. The 6BT is slightly taller with the intake horn. And slightly longer (the Cummins A/C pulley and oil fill tube sit in about the same plane as the Toyota mechanical fan).
The 6BT/NV4500 in the video also has an Advance Adapters output housing on the NV4500, not a Dodge 4WD extension housing (which is the housing you would use for the Wits' End kit). But the dimensions of the transmissions are similar as well.
I'm sorry, I don't know the weight difference. I assume the 6BT is heavier than the 1FZ-FE (because it's all cast-iron), and that the NV4500 is lighter than the Toyota auto. My vague recollection was that the 6BT/NV4500 was about 300 lbs heavier in total, but that includes the turbo, intercooler, piping, and cast-iron head from the 6BT setup. About the same weight difference as a heavy-duty bumper and winch...but with twice as much torque
Will Van
GOLD Star
BTW, are you guys rebuilding the NV4500 yourself? Or getting someone else to do it? Who are you using for transmission rebuild?
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