Stroking a 318 to a 390

About to find out what one with Eddy heads, Comp XE275HL with 1.6 rockers, air gap, and 750 DP will do in month or two, but hopefully sooner. This started as the
"340 extended cab W150 project" but has been on a steady state of escalation. 3.55 gears, 33X12.50s, NV4500HD. Got 4.10 axles already on hand in case 3.55's aren't enough. No one ever accused us of being sane for some reason...