1965cutlassragtop

I HAVE A 330ci HIGH COMPRESSION W/ A TH350 TRANNY. I INSTALLED AN AFTERMARKET TACHOMETER AFTER MODIFYING THE MOTOR, FOR OBVIOUS REASONS. I AM WONDERING WHAT I SHOULD HAVE THE REDLINE SET AT. USUALLY, I NEVER SEE IT GET OVER 4000-4500. I JUST WANT TO MAKE SURE I'M NOT PUSHING IT TOO MUCH, AS WELL AS TOO LITTLE!! IF I SPIN THE TIRES, I USUALLY BRING IT UP BETWEEN 3000-4000 AND THOSE THINGS ARE BOILING NO PROBLEM. ANY HELP/SUGGESTIONS/INFO??