jthomas38
New Member
I am new to the forum and will have many questions. I just bought a 1970 duster which was the first car that I owned as a teen and totaled just as I was getting good at driving a stick.. The one that I owned had a 318 with a holley 4 barrel, headers, 4 speed with a hurst shifter and a few other extras, seemed to have plenty of horse power to me. The car that I just got has a running 318 in it but also has a 340 block with crank and piston rods. I know that the 340 is a very reputable engine but its stamp date is 72. I have heard that after 1970 the compression dropped and so the horse power. Im not an engine guy so is that inherent to the block or something else. Basically am I better off putting money for horses into the running 318 or starting fresh with the 340. Also what if anything will direct swap from the 318 to the 340? Thanks in advance,