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Re: 5-speed for 69 C10?
1967 was the last year the truck bellhousing had a 4.685in. bellhousing hole.
1968 and up had a larger 5.125in. bellhousing hole. That is why the 67 trucks didn't need the throughout bearing spacer like I did.
It really helps to locate the transmission accurately for long clutch and transmission life. Having said this, There are people who put the small retainer into the large bellhousing and it seems to work. Just something to remember if the clutch gets trashed prematurely.
I did install the Tremec at first with the low hump cab. There was less than 1/2 in. clearence between the top of the transmission and the floorboard. It is not the best picture, but you see it is really tight. Maybe if I had new cab bushings and floor supports there might have been enough clearance. That is why I went to a high hump cover. Easier to service the transmission in the future if necessary.
The New Venture NV3550 (second picture) is not the same transmission as the Tremec 3550,TKO series (third picture) transmission. Different companies.
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