Email them and ask them if the 351 is a roller. Still don't know what you mean by your last 'block' having too much lift.
You'll need to get your block, your heads, your cam and then mock up and measure. Use an adjustable pushrod and check the rocker/valve stem geometry to get the proper pushrod length. Measure spring rate and check with cam manufacturer to see if the springs have enough force to match the lobe design. Measure them for bind height and check that against lobe lift/rocker ratio. If all that checks out, then you can degree the cam in and check p to v. But your peak lift has nothing to do with p to v. And no one, even Smock (all respect) can tell you what valve timing events are gonna clear in an engine you don't have yet, with who knows what kind of pistons in it and heads that have been milled some amount we don't know. You've got to mock it up and measure, or else you're just guessing.
