Please look past my lack of knowledge on GN's for a minute. I'm a fan but not an owner. I'm familiar with Garret turbo's but all the GN stuff seems to be different in that the are letters with numbers. My question is what years had the .82 housings and what is a TA49? What years had these. I know the 86-87 have a .63 turbine, but do all years have the same compressor. I've searched but haven't found alot of answers. I'm looking to put a GN turbo on another vehicle I just don't know the differences to know what year to be looking for. I would really appreciate a qhuick lesson on GN turbo's. Thanks.