Love the sub. I did the 6.2 swap on my 90 and i am pleased with the results. I average 18-19 mpg with a combo of city and hwy driving . The swap is basically straight forward if you have a donor vehicle. The little things will wear you out but overall i am pleased. I have a banks turbo kit in the wings that will help out a lot on the power situation. If you need specifics on the swap let me know.