Pushrod geometry pics

[MercuryMan]

Please forgive my nakedness. ....I'll make it a pretty "blue" color shortly... ;D.......My bottom end is together, all in spec so that was good. I need to get my pushrods sorted out and ordered so I borrowed an adjustable pushrod from Brian Hackett. The first pic is using a stock length pushrod for pedestal mount heads. (all I had to use)....Notice where the roller tip is in reference to the valve stem. I have 1.7 PRW stainless roller rockers on what appears to be stock Ford rocker studs and guide plates. My cam is a .574"/.580" lift hydraulic flat tappet piece. The block is basically zero deck, the pistons are .002" down in the hole. (done previous to my buying it) I set the adjustable pushrod up until I centered the roller tip on the stem. Basically I added up about 5/16" to the length of the stock pushrod in the first pic. The next issue is that there is only about 3/8" of rocker stud protruding through the rocker arm shaft. These pics were taken at close to TDC with the valve seated, I used an old hyd lifter shimmed solid so there was no play in it. I'm thinking longer studs would be a good investment.

1) will this new length be right and good to go?
2) should I upgrade to ARP studs and better plates?
3) do I need to upgrade to 3/8" pushrods?
4) Is there enough stud protrusion to secure the rocker arm safely for 6000rpm max?

[Road Rage Racing]

You'll hear arguments for both 5/16" & 3/8" pushrods but since your probably not going to spin the hell out of this and weight of the valvetrain wont be a huge factor, i'd go with the 3/8", that's just my opinion.

By looking at the pics i'd definitely get some longer rocker studs, just to be safe.

It's hard to tell from the pic if the pushrod length will be ok. What I like to do is use a black marker, color the top of the valve stem in, install all the parts and roll the engine over by hand to see exactly where the roller travels across the stems tip. It should have a short sweep from the intake side to the exhaust side of the head.

[MercuryMan]

I got it all sorted out yesterday, needed 2 different length pushrods so they are ordered - Manley has some almost the perfect length. I shimmed the intake rocker studs with a 7/16" ARP head bolt washer and it's all good now. The exhaust rocker studs were ok because the pushrod is a fair bit shorter. The want close to $200 with the taxes for a set of extended length studs. If they come in early next week I might be making noise by next weekend. ;D ;D ;D