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Ieatcamaros · 12-07-2004, 06:06 PM

The duration has a lot to do with your piston to valve clearance. What year are the 351 heads you have? No matter the year, you will need to upgrade the valve springs. I would imagine you would be alright with ptv clearance, but you ALWAYS need to check it. What motor is this going in and what are the rest of the cam specs?

12-07-2004, 06:06 PM	#2
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	Re: cam The duration has a lot to do with your piston to valve clearance. What year are the 351 heads you have? No matter the year, you will need to upgrade the valve springs. I would imagine you would be alright with ptv clearance, but you ALWAYS need to check it. What motor is this going in and what are the rest of the cam specs? __________________ The sig says it all.