SBC 355 CID , mild cam, Edelbrock heads, 10.5:1 comp. it has 1st Fuel Injection manifold, and Affordable FI injectors, harness & ECM. AFI distributor. All parts as new, a few hours running.
Its in a Jeep rockcrawler , full gauges, 18-20 lbs vacuum at idle, very responsive / snappy throttle, 14 volts, 40 psi fuel pressure- 32 or so at idle with vacuum regulator, Aeromotive "700" HP pump, 11106 - A750 FUEL PUMP (RED), 13109 - A1000-6 INJECTED BYPASS REGULATOR. It's a full return system. Pump runs but never "dead heads", pumps noisy, good fuel psi..
Race car style switches, separate circuits for fuel pump, ignition, etc...

The problem is, cold crank takes along time to start. Starts best with short bursts when cold, no throttle, takes 4/5/6 times to start cold.
When run to temp and driven, cools down after about 15-30 minutes , takes along time to start, cranks and cranks, starts, no throttle response, won't rev, stalls. Once it's works through this phase runs great.
New plugs, New to TPI and just joined this forum