good morning all, technical question for you guys. have a nos set of jahns 12 to l pistons . the box states that they are 4 in. pistons. would like to use these in my 61 truck block with the rods and crank. does anyone know if a 292 block will bore this far without sleeves. if so, what kind of cubic inches would it produce. also  with the new composite head gaskets, g heads , any thoughts as to compression ratio assuming no cutting of the heads or block? thanks for the input.