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| | | | Joined: Nov 2008 Posts: 49 New Guy | | New Guy Joined: Nov 2008 Posts: 49 | still complexed about what to do...1940 chevy 1/2 ton mid 50s 6cyl. ( I think)Is there an ADAPTER PLATE TO MATCH A 400 AUTOMATIC TO THIS MOTOR..AND IF SO WHAT GEAR RATIO WOULD WORD BEST FOR EVERY DAY USE..TOWN AND HWY DRIVING..IF THE PLATE IS MADE WHO AND APPROX. HOW MUCH... | | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | There are two sources of adapter plates that I am aware of. Langdon's Stovebolt makes one and Buffalo Enterprises makes one. Langdon is probably linked from the vendor list here and Buffalo can be found on the Inliners.org site. I'd expect to spend $400-ish.
The TH400 is much heavier than a TH350 and consumes more power in operation. I think its overkill for a mid 50s six unless you are running a blower and nitrous. Maybe even then.
You probably want gears somewhere in the 3's. Engine mods, tire size, highway speed and loaded weight would all affect what is 'best' in your case.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Mar 2009 Posts: 788 'Bolter | | 'Bolter Joined: Mar 2009 Posts: 788 | if you put in a 400 you are going to have to change the eng mounting as you will loose your bellhousing mounting and will require side mounting for the eng if you could find one and if you wanted an a/t with that motor which would bolt up and also be able to side mount, would be to put in a hydramatic. 4spd and same final drive http://yfrog.com/12dscn2074ljron | | | | | Joined: Dec 2004 Posts: 1,897 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 1,897 | with the 235, I think you would want your gears to be closer to 3.55:1. If you were using a SBC motor, something more like 3.07:1 would be better. I would try mating a 700r4 and using 3.9:1 gears if I were putting an auto. Actually scratch that... I would never put an auto in a 1940 truck. :P | | |
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