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Hi Guys,
Joe...3:73's in my coupe (347 stroker) and was planning on a Tremec 5 speed.
I had the TKO with the .63 overdrive behind a 460/530hp/530lb.ft. motor, 3:73 rear end and first gear was useless but, on the highway cruising in 5th it always had the torque to pull anytime with very little gas. I currently have the same transmission in my Coupe with a 418/560hp/580lb.ft. of torque, 3:55 rear end and first gear is a joy to wind up and I still have the torque on the highway to accelerate with no problem. The motor in the Coupe makes 500 lb.ft. of torque at 2400 RPM. In both of these applications the 2-3-4 shift with the engine wound up to 5000 + it will take your breath away. I put the TKO with the .63 5th into my Unique with a 427 and 3:54 rear end and it was always great in all gears, that was a very good combination for the street.
Given the above experience you can play that against what torque your motor will produce at what RPM and you decide what you need for how you plan to drive it. I would suspect that the 302/347 would not have the torque to pull at lower RPMs. I had a 300 hp 302 in my Shell valley with a t-5 behind it and 5th gear on the highway was only good if I had it turning 3000 RPM + and then really had to downshift if I wanted any acceleration. If you go with the TKO 600 and the higher 5th gear (.82) that should eliminate the problem I ran into with my 302.
I case you are wodering I have had four Cobra Roadsters and currently have CSX4264 427/toploder in the garage sitting with the Daytona.....the other three have gone down the road to make other guys happy.
Best Regards,
Tony R.
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