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Old 01-29-2004, 03:35 PM
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700R4 trans conversion to 70' C10 2WD

Looking for advice on installing a 89' 700R4 into my 70' C10 2WD p/u. Specifically, do I have to remove the bellhousing x-member that supports the rear of the engine? Front engine mounts are A-frame type. If new rear engine mounts are needed, where can I find them?

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Old 01-29-2004, 04:07 PM
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What transmission is in your truck now?
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Old 01-29-2004, 04:17 PM
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3-spd. manual. The motor is 307.
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Old 01-30-2004, 08:18 PM
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69 chevy c-10 700r4 swap

Hello, I have a 1969 chevy c-10 that I am doing a very similar swap in. The trans is going in tommorow. This truck started out as a 307 like yours, with a 4 speed on the floor granny low trans. Well, the motor gave up the ghost a couple of months back, so instead of rebulding the 307, we got a 4 bolt main 350 and built it up. Well, last week the trans blew up(stripped out 2 gears) so we are putting in a 700r4. You have to cut out the old frame member that the bell housing bolted up to in the old trans. And let me tell you, its fun to get out! our local exhaust shop has a 71 with the same set up and he just has the motor mounts, and trans mounts to hold it in, no rear motor mount necessary, which is the same route we are going. We purchased a automatic crossmember from GMC Pauls web site, and thats it. If you have any specific questions as far as parts, let me know, as I am going through all of it right now.
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Old 01-31-2004, 12:14 AM
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Thanks Subman,

I've been advised that using only the a-frame motor mounts and the trans crossmember can be hazardous to your trans case. Also, it may cause undesireable vibration during acceleration etc.

I found a part in the Summit on-line catalog made by Competition Engineering called a mid-mount plate. Just ordered it for $32. It attaches between engine and trans and it extends downward to frame about where the old bellhousing mounted. May have to drill new holes in the frame.

For $32 bucks it sounds like bullet-proof insurance. Summit can ship next day, so maybe its worth a look for you as well.
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Old 01-31-2004, 02:56 AM
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Thanks for the advice, sounds good to me too, I was a little uncomfortable about that aspect of the install. Ohh, and by the way, I have a good friend that lives in orangevale, I am up there all the time, small world.
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