injector resistor box hard to find?...the local junkyard by me has 5 sitting around...they are not rare...you can use any hf or si inj resistor and get them for $5 at the junkyard

you'd have to get a new headgasket & bolts and would be wise to rebuild the head since you don't know the its history

it's probably easier for you to find a whole d16a6 engine for $500 and put it in an hf or si chassis that has almost all the parts...or get hte inj resistor box and a wiring conv harness for a dx chassis