Thank you both for your reply. First off I didn't realize it was a downgrade-I didn't/don't know anything about the D15b as it is. I was having a hard time finding a replacement B18a1 and when I called a shop that claimed to have 1 he no longer had it when I went to buy it which is why I allowed him to talk me into buying the D15b. The engine came complete, wiring harness, tranny and all but no ECU.

As far as rebuilding the old engine I have 2 cracks in the cylinders and a crack in the block which I was told involved a lot of work, time and money to get back in running condition.