Help identifying pistons and cylinder heads

pittsburghracer said

If you go with this set that are set up for hydraulic roller the come with nice 10 degree retainers and keepers. The springs are reportedly set up light for a 600
Lift cam which plays into the hands of many guys wanting to run smaller lift cams. If I remember right there were 4-6 shims to even lower the pressure more. The retainers were chrome moly and very nice looking. If the sale happens these were 40% off this price shipped free.

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Thank you for the info! Maybe if I go for these ones, instead of the hydraulic flat tappet ones, I can run a solid flat tappet instead...but then I will have to spring for some adjustable rockers, as I don't think the factory stamped obviously can be used....Im just watching the budget fly out the window as I think right now! lol

They are a damn good deal on Black Friday though for sure. Would you be confident running these heads out of the box John?

EDIT: I see the valve springs are listed as 145 closed and 360 open for the hydraulic flat tappet. Wonder if that's enough for some solid flat tappet cams.