Cheepy Three-Sixty build

As it sits the bottom end will be comprised of:
73' 360 .020"
Magnum '93 Con rods w/ARP bolts
H405CP.020 pistons @ zero deck
Cast crank .020/.020" balanced externally
Durabond cam bearings, King mains/rods
Crane H272-2 hyd flat tappet
Good t-chain (undecided)
M72 w/rear sump pick-up & pan

The top end will get interesting. I may utilize some stock Magnum head castings, fix the cracks with seat inserts, port them and use stock (cuz that's what I have on hand) G3 Hemi valves, springs, retainers, locks. I test fitted a 2.00" 1.55" G3 valve into the Magnum castings and they look right at home. Of course I need to look at spring pressures, lengths, etc..... I'm leaning towards some Comp 5/16" studs /guideplates and some steel roller tip rockers. Pretty sure I'm gonna go this way because I like to be different and I doubt its been done more than a few times. Of course a OEM Magnum head will dictate a Magnum manifold so likely a Cross-wind will top this project. J.Rob