Calculate 1/4
A couple thoughts..........
Until you get the 60's inline, you can just about throw your current 1/8th mile numbers away. Tire slip, going across the stripe at less the optimal rpm's and not enough time to build mph makes them almost worthless to me at this point.
Even though i can't make a recommendation, the drag radials do seem to be your best option. Only thing to add would be check the weather forecast well before venturing out as 85 miles from home is a long way to get caught in the rain on DR's.
Once you get that sorted out, i believe running that cam, that there is some performance to be gained by going to a more aggressive intake, RPM maybe?
Good Luck, Rick