HELP! Need 318 Head Suggestion (info provided)

I really think that a 318 head with some minor porting (in the right spots) will get you to 275 HP. 1970 318's were rated at 230. (crankshaft hp). I measured a set of 1975 318 heads and they came out to 72 cc so the 74 reading could be considered "in the ball park". Another cheap option would be a set of 360 heads BUT, more compression would make them more usable in the lower rpms. I dont think you would need eddy heads unless you had more compression and a bigger cam. 360 heads would be good with a small cam. IMHO. (the smaller 318 port will keep the velocity up in the lower rpm range- they just dont breath as well at higher rpm) Open up the pushrod pinch a bit and blend the bowl area, smooth out the guide boss a little. Might get you to 5000 rpm with the right cam. JMHO. Enjoy!!