C6 bolt patterns and interchangability

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Mar 18, 2004 | 10:26 AM

roscoe

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C6 bolt patterns and interchangability

I have a 78 F150 351M C6 with full time 4x4 (converted to part time). I want to swap the 351M for a small block engine which means I need another C6 with the small block bolt pattern that will also bolt to my full time transfer case.

My questions:

Will any year small block C6 4x4 transmission bolt to the existing full time case?

Will a newer C6 tranny and transfer case, say from a mid-late 80's truck, bolt to the drive shafts?

Thanks i advance,
John

Last edited by roscoe; Mar 18, 2004 at 10:28 AM.

Mar 18, 2004 | 03:28 PM

RTM

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Joined: Dec 2003

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From: Sunny Florida

It's my understand that all the transfer cases share the same mounting pattern. People install 205 cases on the back of the ZF trans.

I am not sure about the drive shafts bolting up from late to early.

I say just get a small block C-6 trans from a 4X4 and mount your case on it. Now I am not sure if the small block motor sits any further forward or back than the 351M. I would guess the trans ends up clode to the same position or there would be different cross members.

I may have an extra small block C-6 soon. I just have to go get the truck and I haven't even looked at it yet.