Ryan
Vettes run F70 -15's -
My LT1 has 3.55's with the M20 which is about the same effective first gear as a M21 with 3.90's - runs out nice and pulls pretty well from the hole.
The performance ratio with the M20 was 3.70
Economy with M20 was 3.36
Perf M21 4.10
Econ M21 3.55
Std M21 3.70
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~JAG~
NCRS#65120
68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car
#21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built.
71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist.
NUMEROUS Lemans blue Camaros,
Monza Red and Daytona Yellow Corvettes
& a Chevelle or two...
Survivors, restored cars, & other photos
https://picasaweb.google.com/lh/myphotos
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