i've just done the rb26 conversion but was running the autronic smc computer management system prior and found it quite easy.there was a slight mod to be done to the cross member,pulley to be pressed 5mm of the power steering pump to match 26 front pulley'and re-piping intercooling.radiator,throttle cabel,thrust bearing and gearbox all fit no problems.well worth the effort.i hope this helps.