Jet sizes for 410 stroker

I'm building a 410 stroker. What size jets should I start with in a Pro-Form 750 Mech Sec's with the combo below? Here's what it has or will have:
360, .040 over
4" Eagle cast crank
KB forged dish pistons (KB 745)
Comp Cam 239 int./246 exh@.050, .484/.484 lift, but I'm using magnum heads, so that lift is about .516
Airgap intake

I'm looking at 750 pro form with 84/78 jets, mech secondaries. Seems a bit big to me. What size jets will I need to change to for my combo.
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