Do you have the heads already?
Now with the cleveland I know they got cooling problems and my builder has said that .030 over was too much but again I do not have the upmost info on them.
Any big bore build I would use a single plane.
Who is building it for you?
Also with a custom cam, the grinder will have some input also so pick his brain .
Sorry not a ton of answers and some more questions LOL.
2016 VW GTI 2.0 Turbo
1989 Sonic Blue LX Coupe, 349 ci, TW heads, TFS Track Heat Intake, 75mm Accufab TB, 80mm ProM, 30 lb. inj, TKO, 3.73, 31 spline w/ TruTrac, MAC 1-5/8" LT headers w/ H pipe, Flowmaster, electric fan Moates QH
391 rwhp & 424 rwtq...Mustang Dyno 11.5@122mph