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Author
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Topic: Early C4 behind 351C 4V?
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Fastback68
Gearhead Posts: 3332
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 01-26-2005 10:38 PM
   
I know folks are always saying C4s are fine behind stock, or even built, 351s. I've just scored a 1972 C4 which I'd really like to pop into my 68 w/302. It doesn't need the extra splines yet, but this car is a keeper. Who knows what I'll do to the motor one day?
Which leaves a 1972 (which I will one day sell) with a 351C 4V in need of a tranny. Can I pop the 68's C4 in and be well on the safe side? Or does the 351C 4V really appreciate those extra splines?
No strip work planned here, yet, in either car. Just the usual traffic light burnoffs.
Thanks for any opinions,
Simon
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Fastback68
Gearhead Posts: 3332
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 01-26-2005 10:46 PM
P.S.: I know the simple answer is just to wait for another post-1970 C4, but C4s and even C6s are hard to find here these days - except in cars.
FMXs are plentiful - I have two myself. Perhaps that would be a better option than an early C4?[This message has been edited by Fastback68 (edited 01-26-2005).]
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clevelandstyle
Gearhead Posts: 1098
From: Connersville, IN
Registered: Jul 2001
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posted 01-27-2005 07:18 PM
I my opinion, the 24 spline, early C4 would be fine with a street 351C if you are not going to race it and you are running street tires. A 351C 4V is not know for it's drive train twisting torque anyway. The small input shaft "may" become a problem if you are going to ask more of it. ------------------
Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 408C 4V, 10.50 127 MPH
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Fastback68
Gearhead Posts: 3332
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 01-27-2005 08:44 PM
Thanks Ben! That makes sense that torque monster is going to need a stronger tranny than a high rpm motor. I'd got into the wrong frame of mind by thinking a high performance engine (which the 351C 4V is, comparatively) also needed a tougher tranny.
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clevelandstyle
Gearhead Posts: 1098
From: Connersville, IN
Registered: Jul 2001
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posted 01-27-2005 09:43 PM
I'm not saying that a "high performance" cleveland doesn't need a 26 spline C4. I am saying that a "street" type cleveland doesn't HAVE to have it. I'm thinking mostly stock with bolt ons. If you are building up the engine, you should step up the trans too. ------------------
Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 408C 4V, 10.50 127 MPH
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