O/K, this is what i have in my inventory. I have three L-28 rebuilt short blocks (1) F/54 block bored .020 with a polished crank installed with clevite bearings and dished pistons, new timing chain kit and gaskets, (2) F/54 block bored .040 with ITM pistons, polished crank and clevite bearings, (3) N-42 block bored .030 with polished crank, clevite bearings and Nylen dished pistons not yet installed made in Japan. The last two blocks can be completed within two days of order. With that said, i also have a very good used F/54 with flat top pistons i bought from a machine shop and can be a good candidate if you need a used block. I have four N/42 heads with different specs depending on what you want. One N-42 head set up for dished pistons and ported that will get you 9.5 to 1 i believe somewhere in there. Send me a p/m and i'll give you my address to come and see first hand. Later !