Do not feel alone with your confusion, many of us have been there too. Those of us that are married; choose to remain confused, it keeps the wives away..
You are honestly looking at an entirely new motor to include valve train. let go of the past... Psychological trap all conservative motor builders fall into.
1) My first recommendation is stop, relax and watch this video "atleast twice"...
https://www.youtube.com/watch?v=o5is9BsH5OU. You will be smart fallowing it! No insult to your current intelligent level.
2) Back to the confusion; Looking at your post and photo; first contributing factor as you stated is the fact the heads milled "twice" that brings a fellow fox father a more grave concern is both phases of compression ratio issue you will deal with next. Keep that in mind O.K. Piston to valve clearance is now an issue regardless of the larger P head volume chambers in comparison to aftermarket aluminium heads.
I am also counting on our fellow Fox daddies to pick up and chime in O.K.
The photo looks like the factory push rods ?? Toss them or weld them into a cool BBQ grill, I'll bring the Delmonico steaks! Your motor is worth ten times those push rods.
3) You must accept the fact that you are building a "new" motor and will have to order the correct pushrods. not an expensive endeavor unless you do not do so.
I strongly recommend spending the few dollars and "invest in your new motor", with the purchase of an adjustable pushrod length push rod tool. Yes, look at your motor with those very good choice Scorpion rockers; that I've spun up to 7500 on a dyno stand with no issue and they asked for more and tell your motor, your worth it baby!
O.k watch the attached video like..real smart professional on it.
3) divorce your mind trap of past usage of parts and start a fresh approach., Check everything, lifter position, rocker installation, what shims or bars do I have installed under them, head gasket thickness, and can you check back with your machinist and get the figures on the head deck height (-) or cut from stock. Block deck height figures as well.
4) mock the heads back up, torque them down and start again with the adjustable push rod , "tool" REGARDLESS of the pushrod company you choose, i.e crane, comp cam, and on and on; all can provide down to the micro length the correct length pushrods you need. If they cannot ..."run". I am certain no fox daddy will challenge that advise!
5) Unless your scorpions are not installed correctly pedestal or post, you should get the just of my advise and start fresh.
HANG IN THERE!
Note: I just finished another 357 build number 3, and this time, the push rod length cam out to be exactly the same length as a stock "Dodge" 318 motor", so you will never know unless you do it right; every build will be different. If anyone on here or in the known universe tells you they can build a bunch of motors and use the same "length" pushrods...run faster.
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