Clutch question when swapping engines

[dubie]

When I go from my inline to the 350, will i have to replace the clutch with a 12"? I was talking with a mechanic buddy of mine yesterday and he figured I should go with a bigger clutch. but I figured if i am staying with the 3 speed tranny, i might as well stay with the one I have. Any thought on this

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72 C/10 LWB 2wd
250 inline 6, 3 speed column shift. Soon to have a total facelift.

[O'l Buck]

I'm not sure what's reccomended, but if I remember right, most v-8s use a 12" clutch, and if I was changing engines, or even pulling an engine to reseal or something, i'd replace the clutch, just because the $$ to replace now makes more sense than pulling the engine again when the old used clutch goes kaput.

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Ol' Buck: '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84
ralleys and 31/10.5s

Angel girl: 67 Cutlass convertible
330, 3spd stick

Greener: 90 GMC Jimmy
350/auto
Chad Stephens
Orleans,NE

no name yet: 72 442 under serious construction
my site:
http://communities.msn.com/Beastonabudget/homepage

[okietruck]

I recently swapped the I6 for a V8 in my 72 and used the same clutch (stock 10 1/2" diaphram) with no problems. You may have to go to a larger flywheel if you use a 12" clutch. I have a heavy-duty 11" I plan on putting in mine when the time comes.

[tom hand]

If the clutch is in good shape I would use it,becuase the weak point will be that trans behind a V-8. If anything shows the slightist bit of abuse now is the time to change it.

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72 GMC Sierra SWB almost finished---- 84 Softail
Olive Branch MS