Ill go against the grain...gears would be the last thing id change..no need to kill streetability....
Sidewinder heads, diff cam and a street dommy or rpm intake. High 11s to 12.0s, easy if the tune is good and converter is legit....
For a street car with street tires, replacing the gear would not make my top 100 things to do, even if they were free.
To the OP, are you running pump gas? Very surprised that you don't have detonation with those pistons and that cam.
And honestly, without some track data, it is hard to say where the next best place is to spend money. If your exhaust is
known to be decent, then I'm with the intake and cam crowd. If the heads are marginal (which they usually are unless you or someone has plowed a bunch of money into them) then get some aluminum heads. Which ones might be best determined by the current cranking cylinder pressure numbers.
