385 CI applies to standard bore 343. Randy has stated that 360's can go over 0.060" fairly safely and aside from the lower deck and smaller stock head bolts the 343 should be as beefy as a 360. Roughly a 397 would result with max overbore and 401 crank. Steve Avery Santa Maria, Ca. Re: STROKER Engines Date: Thursday, January 27, 2005 11:32 AM From: What is the final CI size of a 343 with a 401 crank assuming it is a standard bore? What is the largest (safe) overbore that can be done on a 343 block? With the largest overbore plus the 401 crank.....what would that CI be? Rocky ----- Original Message ----- Sent: Thursday, January 27, 2005 6:03 AM Subject: Re: STROKER Engines