Thread: 402 needs more power (heads & cam)

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you do not need new heads. them iron heads i used many times if engine is built right as for size of cam. i go hyd roller on bbc for street most all the time .a kit may be your best way to go for $$ . you do not have enough info on parts listed on your 402 to give me what way you can go .i need cr or piston numbers should be stamp in the piston to .as for rpm you only need to take the engine only were it is going to make power cam and heads intake carb cfm plays in to this . a well built stock bottom end bbc can take 6500+ most all the time with a good oil pan and damper. it not the bottom end that would stop you from hi rpm it is valve train build it right there is no need to take it this hi in rpms any ways with a 5 speed .what helps is a good machine shop/ parts source . getting back to the heads. if heads have been worked over and they do not need a lot of work just a multi angle valve job some bowl work good flowing valves if needing new valves and valve guids then at this time i move up to a 11/32 valve stem it helps some for alve train weigth and flow it not a lot but helps . i built many bbc using them heads . but if you have no engine shops were your at then new may be a better way to go at all come down to hourly rate to the cost of new heads