Hello there
Best of luck with your 1994 acura integra LS. The new integra GS R B18C engine is a great improvement. But it is likely that the gearbox has to be changed. The stock gearbox on the LS model is not the same as the gearbox on the GS R; which was developed to handle the higher RPM of the B18C engine. Driving and performance of the B18C may be affected while using the LS transmission.