Hi Jim: I've heard what everyone said & I agree with most. I've got a pretty healthy 327 in a 65 SS with a M-20 4 speed, a 12 bolt & 3.73 gears. I'm running Coker 75 series redline tires about 28 inches high. It's great in town, the suburbs & back roads. On the highway at 60-65 I'm taching 3000-3200 rpms & people are blowing me off the road. I try to drive non-highway as much as possible. I also drag race it a few time a season. The future may include a 5 or 6 speed. It's mainly a show car & a cruiser. The max its been on the road is 100 miles one way. The Flowmasters are singing all the way!! It's noisy!
If you plan little or no highway use & will be driving mostly in town & around, with an occasional trip to the drags, you could get away with the 4.56. If you plan to cruise & put it on the road stay away. Go with the 3.55-3.73. The 3.73 is about the most versitile and that's stretching it. Use the ratio that will best fit what your plans are for the car. Be realistic. With a 4.56 you may have to trailer to some events as necessary. I enjoy driving my car & am not interested in burning out my engine prematurely. Those 5 & 6 speeds with the .8 & .6 gears are looking better every year!! Good luck with your decision & Happy Cruising!!!
Phil G. 65 SS
-----Original Message-----
From: J. Brady <[EMAIL PROTECTED]>
To: Chevelle Group <[email protected]>
Sent: Mon, 28 Nov 2005 13:24:17 -0800 (PST)
Subject: [Chevelle-list] 3.73 or 4.56?
OK folks,
I have the opportunity to use 3.73 or 4.56 gears in
the 10-bolt posi I'm going to put in the '66. The car
has a 300+/-HP 327 and PG. Anyone have any thoughts
or previous experience with the 4.56 gears and the
PG/small block setup?
I drive the car to local shows, and want to be able to
take it to Cecil on occasion. A relative told me to
do the 4.56s and nothing less, thus my indecision.
Thanks,
Jim
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