advance springs

use one of the mr gasket advance springs, replace the larger heavier spring. if you replace both the timing will possibly bounce at idle and advance too quick. i have them in a slant 6 with a little hotter cam and 4 barrel. one spring is all you need.

For even more fun, purchase the advance plate sold by 4 seconds flat.com and then you can increase your initial timing to 10 or so and get better throttle response from a stop.