Slick 60's

O.k... going to run a 300/6 with the mild performance of a clifford intake and exhaust, comp cam and a 4 barrel carb. Trans is a mid 70's floor shifter three speed with overdrive.. I been getting different opinions from people...what do you guys think? Any ideas on a good ratio for the rear end? I want something to handle highway/ daily driver miles. Not sure of tires to run either...more concerned about ratios at the moment..( always easier to change tires..no?)

I did a lot of research while doing my T19 swap, http://www.fordtruk.com/forums/viewtopi ... hlight=t19 here is a chart for the 80's overdrive. You probably already have 3.70's which would be fine with the overdrive.

Ratios RPM 65 MPH in top gear

3.55 2256
3.73 2370

the wifes 66 has 3.50 gears with the clifford intake and headers, has the 4 speed trans.

tire size makes a difference. try this calculator. http://www.ringpinion.com/Calc_RPM.aspx
keith