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Old 10-21-2003, 09:38 PM
D88 D88 is offline
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Crossmember help!

I have a 1980 Delta 88 that had a v-6 231 (dont ask me why) and I (well friend of mine) is in the process of putting a Olds 350 with Th350 trans in it. I know very little about cars, but I know the transmission mount for the th350 is not fitting on the crossmember (because of the v-6???). But I am wondering could I use a crossmember from a Delta 88 with a 307 or does it have to be a Delta that has a 350 in it?
Thanx in Advance
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Old 10-21-2003, 11:13 PM
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U need the cross-member, radiator, and motor mounts out of a v8 car. However, i dont remember what years interchange. Just go to the parts store and buy motor mounts for a v8 of that year. there like $10 a piece. There should already be holes in the frame for the v8 mounts. Maybee someone else here could help me out on that
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Old 10-22-2003, 05:31 AM
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yea the motors in and mounted, so is radiator...it's just that the transmission will not mount up, but will let's say a 80 Delta 88 with a 307 crossmember fit on the 350? Or would I have to find a delta 88 with a 350 in it?
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Old 10-22-2003, 05:40 AM
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cross member

cross member will be the same in the 80 to put 200 tranny you most likely had with the v6 and replacing it with a 350 tranny,
did that change out alot back then.
did it have a side step mount from the old tranny, with a bracket to cat converter?

step mount is an off set mount and my old parts books show's 3 different mounts back then


your local parts store would be a good place to start
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Old 10-22-2003, 02:20 PM
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yea the mount on the old transmission is off set, which is starting the whole problem. The th350's mount is centered, so therfore bolts are off. Is there anything I can do, or could there be a th350 mount that is off centered??
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Old 10-22-2003, 05:27 PM
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tranny mount

reuse tranny mount from the 200 that is off set and trouble should be over.
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Old 10-22-2003, 06:10 PM
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the bolt holes do not match up...the th350's holes are wider than the 200's.
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Old 10-22-2003, 07:18 PM
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tranny mount

sounds like you have a 400 not 350
bolt hole's on 200, 200r4 , 350 and 700 at the case are all the same distance between bolt holes, but several different tranny mounts are made for cross members. they have one new mount that replaced about 10 different old style mount's


not the off set one
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Old 10-23-2003, 10:30 PM
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have you tried to install your drive shaft yet? if it is suddenly to long you may have a TH400.
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