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Former Member
Send PMpeterborough, United Kingdom
Joined: 3/11/2007
Posts: 36
Vette(s): 72 convertible showcar. Featured in movies, tv and newspapers worldwide.
matching numbers. 350, 4 speed.
custom paint and stripes.
Always a crowd pleaser.!
C3 350 4speed Vettes.........2 0r 4 bolt mains. ???????
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Both, lower horsepower were usually 2 bolt, higher horse 4 bolt.
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r
most older c3s were 4 bolts, just look at the harmonic balancer, if it is the wide one it is usually 4 bolt, skinny one is 2 bolt,,rd
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Lifetime Member
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Send PMModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22720
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
All true...except when it's not!
Higher HP cars do normally have the 4 bolt mains, and they do usually have the larger balancers...unless the block has been changed...or the crank...or the balancer, etc.
The only way to know for SURE is to look at the block with the pan off. Casting numbers don't always assure one of 4 or 2 bolts, either...
If the question is which is better for the application, mouse w/4spd, then of course the 4 bolt IS better, but not always a necessity.
My .02c
Higher HP cars do normally have the 4 bolt mains, and they do usually have the larger balancers...unless the block has been changed...or the crank...or the balancer, etc.
The only way to know for SURE is to look at the block with the pan off. Casting numbers don't always assure one of 4 or 2 bolts, either...
If the question is which is better for the application, mouse w/4spd, then of course the 4 bolt IS better, but not always a necessity.
My .02c
Joel Adams
C3VR Lifetime Member #56 
My Link 
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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in Forum: C3 General Discussion
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