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84 PUMPKIN · 11-23-2005, 02:18 PM

A long TH350 transmission will bolt right up with no surgery. Unbolt the crossmember and slide it to the next set of holes and re-use your existing driveshaft. You'll also need a vaccum line for the modulator valve. Just changed a 305/700R combo to a 350/350 in my '84 C10 last week and it's an easy swap. I've done four or five of these swaps.

I've also done several TH400's. They work pretty much the same but you do have to get a longer driveshaft.

11-23-2005, 02:18 PM	#7
84 PUMPKIN Registered User Join Date: Oct 2004 Location: Alabama Posts: 166	Re: transmission question A long TH350 transmission will bolt right up with no surgery. Unbolt the crossmember and slide it to the next set of holes and re-use your existing driveshaft. You'll also need a vaccum line for the modulator valve. Just changed a 305/700R combo to a 350/350 in my '84 C10 last week and it's an easy swap. I've done four or five of these swaps. I've also done several TH400's. They work pretty much the same but you do have to get a longer driveshaft.