Question about 360 blocks

340, the thrusts were made smaller on the big blocks around that time too...well, it might have been 72.. in any case, it's only the cylinder casting cores that were used in both LAs for that short time, and the casting quality is so bad, some have wicked thick major thrusts, and less than .100" on the minor because the cores were not placed properly in the molds...lol.