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View Full Version : 6 cylinder to 8 cylinder swap motor mounts

sandmanb
06-18-2002, 03:17 PM
whats the easiest way to change over from 6 to 8 cylinder mounts? is the only way to cut them out and change them over or is there an easier way?
JEEPGUZZZI
06-19-2002, 02:42 AM
Yep, cut the small welded plate and remove the three bolts. The holes should already be in the frame. If I remember correctly, a couple of the holes are reused, the v-8 mounts will be a couple of inches forward of where the I6 mounts were located. I am not even going to reweld the small plate, the bolts should be enough to hold it.
Thomas DeBusk
06-19-2002, 11:46 AM
I'm doing the same thing: I6 to V8 in a J-truck.

Somewhere along the way I got the idea that you don't have to move the mount on one side, but that's not right, is it? You have to move both, don't you?

I already have both mounts for the V8. Just need to get the I6 mounts out and get the V8 ones in.

Thomas
liliysdad
06-20-2002, 09:52 AM
when i swapped my 304 in i used the frame horns off of an 81 chero, and the two bottom most holes on the horns were the only ones that lined up.
jeepbob
06-23-2002, 10:02 AM
When you redrill the holes don't forget to put a spacer inside the frame box section to keep from crushing the box when tightening the motor mount to frame bolts.
liliysdad
06-25-2002, 09:40 AM
i dont believe the spacer is needed, and can you tell me a way to put them in a boxed frame anyway?? i sure couldnt figure out an easy way, so they didn't go in. no frame crushage problems here!!
JEEPGUZZZI
06-25-2002, 11:36 AM
You should not have to drill holes!! The holes should be there!! Mine were covered by mud and I couldn't see them at first. Take a wire brush to the frame rail. They do not go in exacly the same place, but they do share a couple of the holes. Is there someone near you with a 360 that you could look at? I know that really helped me when I installed the motor mounts and did the radiator. Just park them next to each other and compare!!
liliysdad
06-26-2002, 09:10 AM
i can assure you that, in my case anyway, only two of the correct holes were there. my truck is a '73, so the frame change in '74 may have something to do with this??