I thought I replied to you about these pistons. Guess I didn't, so here goes. I never ran them, but from what I have read here and on the other sites, the engine starts the down to about 30*. Below that you are going to need to plug it in. I was planning to make an intake heater. The 7.3PSD also has a heater in the intake that might work really nice to retrofit. I don't think they smoke any more than a 21:1 motor. There are several guys who have or are running low compression and they'd be better at answering than I am. I can get out the calipers and get an exact measurement if you need. These came from a .030 over block.
Offers will be considered. They will be going on ebay pretty soon if I don't get a serious buyer.
Offers will be considered. They will be going on ebay pretty soon if I don't get a serious buyer.