[brainsboy]

The important thing here is valve train geometery, if it is incorrect you will wear out all the valves and guids very quickly, I have done it before. Remove a rocker arm and look at the wear pattern on the valve tip. The pattern should be in the middle of the valve. If the marks are towards the top edge your push rods are too short.

Take a pushrod to a machine shop and have it measured, from there you can look up pushrods for a 351w and compare sizes.

Ben