What cam should I get?

hi, for a cam in a 273, the isky E 4 grind works very well in a 273 motor.
I use to drive and race a 273 dart in stock elim, and brackets, plus drove it.
the E 4 is a solid cam. 260/ 216 @ .060, .425 lift, 108 LCA. the comp extreme energy 256 or 262 will be very comparable to it. as for RPM range?
with stock single springs, they will rev to 6000 RPM easily. add a little stronger spring, 7000 RPM will not be a problem. a short duration cam with tight lobe centers work very well in stick motors. especially in a 273 motor,
it will pick up the gear change faster and will accelerate quicker. this is from an older stick shift stocker racer.