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Discussion Starter · #1 ·
i have a muncie m21 4 speed 410 12 bolt and a 327 engine going to use in my 68 convert prodject will it be a good combination or will it be to low for cruising . it has a 308 10 bolt in it now. cannot drive it yet . to see if i like it.
 

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If you are going to just cruise stick with the 3.08's. With 4.10's highway cruising @ 60 mph will have your rpm's 3000+.

Dave
 
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