Hi first time poster long time lurker, I would appreciate some advise. My brother and I bought a sapphire that needs to be re-shelled ( we have a near perfect shell) this car was bought after spending 8 years in a shed , when they went to restore it and realized the shell was too bad to repair. We got the engine running for a about a 1 min, but need to rig a better temporary fuel supply , to warm it up and see how it runs before we take it out and do a full rebuild. When we went to jump it again the battery was connected in reverse polarity !!!! ( I know ) . So we sent the ECU off to be repaired (Ailvec IoW) and it still isnt running . we have also replaced the , Phase sensor, rotor arm , distributor cap , Plugs, crank sensor, Map sensor , new fuel regulator, ( pump is running and fuel is returning to the temp tank) . We have a spark & fuel coming out of the injectors

what should I check next ??? what else could be fried ?