Background: The engine described below is in process. Short block assembled and ready to degree cam. All parts listed purchased. Will need to purchase pushrods after getting mid-lift measurement. Also need converter. I know this build is slightly overbore for a wheeler but I believe this engine should match the power output as my current 250hp tired 350 engine does off idle. Hoping to get feedback and a virtual dyno graph to aid in my decision on torque converter.


Rig:
5000lb 4x4, 1 ton CJ7 Jeep 5.13 gears with 37” tires. TH350 tbd stall converter. Not daily driver. 30% high elevation 5000+ft snow, 30% woods 3-5000 ft, 20% town, 20% coast dunes. Not a rock crawler!

Build: ZZ430 clone(ish) with Lunati hyd roller cam
GM 355 aluminum head, flat top piston. 10.48 static compression, .041” squish. 8.29 Dynamic compression at 1500 ft.

Fitech Go EFI self learning TBI fuel injection (250-600hp) 4barrel
Intake: GM Vortec 12464340 (seprated dual plane, no bleed over cutout)
Phenolic Spacer 4 hole 1"
MSD6AL, MSD 85551 dist, 19 degrees mechanical 34 total. w/ 8561 melonized gear, Blaster coil, Taylor 8mm wires, NGK BKR5EGP plugs @ .050”

Top end:
Original ZZ430 Fastburn aluminum heads 62cc chamber, 2.00/1.55” valves 210/78cc runners. Chamber, bowl, port blend and gasket match to MS 98000. 7/16" studs, Isky adj guideplates, PAC Beehive 1218 springs 130/307lb, 1.80/1.24" install height, .100" coil bind clearance (+.05" locks, .06" retainers), Teflon seals, Scorpion 1003 1.6" roller rockers. Cometic C5245-036 MLS head gaskets 4.06" x .036"

Bump stick: Hyd roller
Lunati Voodoo 270/278 pn: 20120711 (60111)
Adv: 270/278
.05": 219/227
LAS/ICL: 112/106
Overlap 50
Lift: .550/.565 (with 1.6 rockers)
Spring pressure: 130lbs seat 302/307 int/ex open

Comp cam 853-16 retro hyd roller lifters

Block:
SBC 1975 3970010 4 bolt 4.030" bore, line honed .005" deck, cast .010/.010 crank (3.48" stroke) chamfered & balanced, 5.7 Scat rods, L2256 TRW forged 6.1cc 4 valve relief pistons balanced. R-9903 Sealed Power rings (plasma moly top ring), Clevite77 rod/main bearings, ACL 910-3349 cam bearings. Cloyes chain with Torrington bearing and button. Alum water pump. 5 qt cheater pan with tray, std melling pump. Other: .04" oil hole in oil plug for timming chain lubrication, oil return screen kit, ARP main studs, teflon rear seal.

Exhaust:
1 5/8” fenderwell headers (maybe 30”) 3” collector, 2 ½” exhaust with hooker aeromax mufflers total 4’ exhaust each side.

Curios what peramters I should set the fuel injection to control vacuum advance. No can on dizzy. Also, I have the option to lock out the dist mech adv. and use the FI to control also.