engine rebuild

[Beany-s12]

cheers for the info chaps! i've already got a silvia engineering twin kenlow set up but forgot to mention it! haven't really got money for lightened and balanced bottom end coz gettin engine gaskets, rings and shells is gonna use most of wot i've got! i was under the impression that the s13 injectors would just run off the standard ecu! wot sort of piggy back system is needed or could i get away with an uprated pressure reg for a while until sorted?