Any opinions on highway driveability for 3:55 vs. 3:90, I like power, but also want to be able to drive a couple hours to shows. Will the 3:90 be too high revving along for highway. It seems I only hit about 4000 in my 198. Thanks for your help!

This will help you work what revs you'll be doing at what speed.
http://vexer.com/automotive-tools/speed-rpm-calculator
If it was me I'd go with the 3.55's

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62 Valiant, 225cid Slant 6/PB 904 with lots of good bits

http://www.moparmarket.com/readersrides ... user=SV162

I don't even like 3.55s for freeway driving. I like 3.23s much better. It depends a lot on what you can stand for 2 hours.

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Joshua

Mr Scamp,

I have 3.55 gears turning 14 inch tires in my 67 Dart. I find that 55 to 60 mph @ around 3000 rpm is a bit busy on a long haul. Where I don’t use my car for a daily driver I can put up with the annoyance motoring 100 miles or so one way to car shows on weekends. With this car’s Turbo Sonic mufflers singing loudly, I generally stuff my ears with those foam hearing protection plugs, making a much more enjoyable journey, particularly when the tachometer drops into the head rattling, resonating, 2500 rpm range.

2.23 gears would drop my 55 - 60 mph rpm about 300 revs. Where you want to be rpm wise at cruse depends on your cam and toque curve. For a stock engine, I should think 3.90 would be way too much gear.

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC

for you rpm range I would go no more then 3.55.in mine I run 4.10 with a 27 tall tire and going down the highway I'm turning 4,000 + just to keep up with traffic.hope this helps you out