I had an 89 w/a fully built zc dropped in. Dropped right in to the stock mounts, no fabrication needed and could some serious smoking. b16-18 is as high as you might want to go. I looked into dropping an h22 when I still owned the car and the shop was like we could do it...but a lot of things have to be replaced and reinforced. So if I had the $$$ I may have gone for it but the price at the time was around $5500 and I just decided to sell my 89 and get a 99 GS-R.