first thing i did was buy a how to modify your L series...full of helpful stuff in it and full of info. pretty much is a step by step, i had a very good u67 head for high comp, the biggest cam grind you can get from a standard cam, flat top forge pistons(ka24 pistons) ka24 crank and much more. Would have been an easy 150hp but never got dynoed. But if you wanna go good you will need to make those points go bye bye, you will need to spend the cash on an electric dizzy. will ned an electric fuel pump and reg to match either dcoe40's or 45 to make sure they have there much needed pressure at all times.....and will need a dogleg gearbox as it will last