Help/advice....PLEASE!

[randyj68]

Ok, I have a 68 f100 longbed 4x2, factory 390, 3speed...... I pulled the motor and am putting a 390 back in but with a C6....... Im having an issue getting the trans crossmember back to its original holes and the driveshaft appears to be too long now? I was thinking it was a bolt in conversion. The 390/C6 came from a 71 f100...........any input?

[fordman]

Here's a chart I whipped up showing the six different transmission crossmembers used in the '67-'72 trucks, as shown in the MPC. The most-common pieces are high-lighted in grey:

[ Image ]

the two on the left are for automatic transmissions. the one on the right is for manual transmissions.



TAGS: transmission crossmember

[Ranchero50]

Ditto, you can slot the holes in the frame or crossmember and you'll need the 3 speed driveshaft.

Jamie

[69rangerf100]

i agree with fordman if you are using the 3spd cross member that is the issue you will need to use the c6 cross member

[fordman]

you can probably use the same crossmember. but you will have to drill holes in the frame to make it fit. and a hole in the crossmember so the transmount will bolt on in the right place.

[cajuncannon03]

The driveshaft will need to be cut (manual) to fit with the C6 Transmission.

[randyj68]

You' all are great! Thanks!