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Just remember with your 3.54's and .64 OD, your final drive ratio will be 2.26. I'm sure you know that with all the calculators. With your FE, you'll have plenty of low and mid range torque, but the real question is, when you are cruising in 5th @ 60-65 mph, will you 1) be able to accel w/o pinging or down-shifting? and 2) is your cam the same as the one you rode in? Depending on how lopey/snotty your cam is, will it cruise in 5th w/o bucking? Your 5th cruise RPM is going to be really low at normal speed limits.
For all of the above discussions, I decided on .82 OD w/3.27's, for my 455 FE, for a 2.68 final ratio. For me personally, I'd rather live with a little more RPM's @ cruise speeds to make sure I stay out of 5th gear bucking, and be able to accelerate w/o downshifting to 4th.
I'm not trying to say you made a bad choice, just my opinion.
good luck!!
Joe
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Wideglidejoe
FFR#6143 Mk III: FE 462" w/four 48 IDA Weber's w/TKO 600 .82, IRS w/3.27, 17" Team III's w/245/45's & 315/35's. Gas N's.
Picked it up end of Aug '08
First start May 12, '10
First go kart May 26, '10
Tag & title 5-26-11, driving in gel coat
Painted Nov 2015
'05 Harley Wide Glide (60 hp stock, now 107 hp & 107 ft/lbs at wheel. Mid 11's in the 1/4 mi.)
'55 Bel Air hot rod project (WIP)
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