You may want to model your motor after the International Harvester V-8's, the low CR gas 348" and 392" motors that powered dump trucks and school buses, as well as their Scouts and Travelalls.
Small, high-velocity ports in low CR heads. The cam specs are really wild, for us used to drag-race inspired durations.
Going off of memory, the cams 0.050 specs are about 193 intake and only 185 or so on the exhaust. I don't remember the LSA, but believe it is rather narrow. These cams are DONE by 4000, but build alot of cylinder pressure down low, and ALOT of lowend torque.
FYI, the IH motors also came with forged crank & rods, and shaft rockers!
FF Cobra Replica. 302, EFI, GT-40 int, T-5, 3.55 gears, 2550# race weight
'69 Falcon Stationwagon, 427" Windsor/Dart (4.125 x 4.000), AFR 225's, 1.7 Probe shaft mounts, solid roller (designed by me), Broader 4R70W, 4030# race weight, 2011 Power Tour Long Hauler, 11.15 @ 121 on pump gas.