Just want to thank all you for taking the time to help me out . I have learned more in a few days than in many hours of trying to sort out the Internet. Re 440 Source: My 413 has the reinforcing ribs along the block sides and the thicker motor mount bosses And I am more confident in using cast" pistons from "Seal Power" I am thinking of using the thinner steel head gasket, and if there are any detonation problems-then can go to the thicker "Fel Pro" composition. Now I am waiting for motor mount brackets to arrive, then I can mock up the engine-bellhouse and tranny to see what other clutch linkage and crossmember modifications I will need . Also making a couple of floor pan patches. Thanks again...........................MO ..........SW IOWA ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.