so im a n00b when it comes to pushrods and things like that...i'll be running a set of 243's with minor porting+polishing, tsp 233/239 cam and dual valve springs on a LS1 346. heads arent milled. what size pushrods will i need? 7.4"? Thanks

 

yah, 7.4 or 7.425 are what you want.