Thread: 4 bolt main?
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Old 10-24-2010, 10:34 AM   #14
68 TT
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Re: 4 bolt main?

Quote:
Originally Posted by baclay9 View Post
Most truck motors (if not all) are two bolt main. Passenger cars (nova's, ect) recieved the 4 bolt mains.
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In my experience it is the other way around. Many trucks with 4-bolts and cars with 2-bolts. Early rare high performance models like Z/28's got 4-bolts but otherwise even the SS cars got 2-bolt blocks at least with small blocks. They weren't shy about putting the steel crank in the 2-bolt car motors though.

In the smog years I have seen nothing but 2-bolts in the cars.

Out of the dozen or so trucks I have owned where I tore the engine apart for one reason or another I would say 75% were 4-bolts.

With big blocks it is more random. The same car model and block casting number could get either.
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