Motor heat - which way do I go with the gearing?

[VintageMA]

Cool - thanks guys, it's more than fast enough more me right now. I don't need more than 40 - 45 for a top speed - it's no fun just goin 60mph in a straight line after a while, and if I wanted that speed I would get an onroad car - which I had and got bored of real fast - bumps hills and rough stuff is where the fun is. :)

Like I said - I wasn't even able to get it to top speed as it (but I was running in the smallest lot out of my usual - there was a boating thing going on and all the big lots were packed with cars).