I am building a mild 1/4 mile s-10 and I only want to run low 15's high 14's. Will have a 350 with mild mods. I am on a tight budget (wife won't raise my allowance she gives me,lol). I have 2 sets of cylinder heads to choose from, here is my question. In the quest for more HP should I go with my 305 heads at 58cc 1.84/1.5 valves or the 350 heads at 76cc 1.94/ 1.5. I am guessing the 305 heads for more compression as long as I run higher octane. And I am 'assuming' the 350 heads will flow a little better but with a mild 350 I wouldn't think that to be a factor. And yes I know, both heads are only good as boat anchors but, I have to use one or the other, wifey won't let me buy vortec's.