[rritchey]

Tim,

If you are not interested in going over mid 500's in HP, there is no need to touch the heads - just use the complete built ones from Edelbrock right out of the box. I used JE flat tops, 4.25" bore, made to work with the 3.98" stroke (11:1 comp.). They are pricy but you can count on them. Arias also makes a good 427 stroker piston. The edelbrock heads already have 2.19" valves in them anyway. I've used the Harland Sharps several times and have always been pleased. On more radical motors I do use the hardened shafts and stands offered by Harland Sharp - and now they offer solid spacers to replace the springs between the rockers.