what lenghts push rods should i run. stock bottom end,stage 1 prc heads, with the ms4 cam. will the 7.4's work

 

Most likely, but I would recommend a pushrod checker to be safe. It's a good $30 investment.

 

They should, but I won't go with me on that. Call Texas Speed and ask them. It's their cam and they sell those heads. They will know for sure. I have a MS3 and am getting stage 2.5-5.3 heads to go with it and they told me 7.4 rods will be fine. Actually, what heads? 5.3 or LS6?

 

ls6 decked less then .010 from stock