gear ratio vs. rpms

[trueblue]

does anybody know where a 302 (factory 2 brrl) runs at as far as the powerband. currently have 3.55 rearend with the 7.5 ratio. have 225/75/15 wheels and tires. wanting to put 235/75/16 wheels and tires. mostly using it for basic transportation but it will haul 2 four-wheelers on a trailer or a 14 foot aluminum boat on a trailer. what would be a good all-around gear ratio for the rearend? this is coupled with a C-4 transmission. also this is 4x4.

 

[BlackBII]

What did the 302 come out of?

Do you know the cam it has?

Once you get that, you can estimate the torque curve, then look here for a gear ratio
http://www.therangerstation.com/tech_library/gearandtirechart.html

 

[trueblue]

gear ratio

it came out of 1979 thunderbird. it is a original ford engine. by the way the country that i live in now is relativley flat. just small rolling hills.

 

[Ranger44]

I'd say just bump up to 3.73's and upgrade that 7.5 to an 8.8 while you're at it.

 

[86ford]

it came out of 1979 thunderbird. it is a original ford engine. by the way the country that i live in now is relativley flat. just small rolling hills.

if you pull weight you need gearing. as for the 302, the only thing i have to use as a judge is my brothers mustang and it does just fine with 3.73s BUT he has one more gear with his AOD so i wouldent recommend more than 355s.

86