the workshop is located around jalan 222. As you come from the federal hwy on to 222, keep going straight until you see the 'mini' roundabout. Keep going straight (12 o'clock), pass the mosque and mamak 'shack' on the right. Follow the road left around the playground and keep going straight until t-junction. Turn left and immediately turn right. There's a row of workshops and he's is the 3rd or 4th one. Probably won't miss it as there are all sorts of stuff being converted to 1j, 2j or rb.
Workshop is called lai fatt. Look for ah loy. Cost probably not the cheapest in town, better you talk to him directly. All i can say is that there are many cars which were transplanted in other workshops which were sent to him to settle the wiring when the other guys cannot complete the job. He appeared on nst's cars bikes and trucks some time back also. For engine transplants he's the man.... Nice guy too.
Pm me if you need his number.