Never said you couldn't, it just takes some Machining to do it on the later blocks which is what I have. 93, 94, and Midway through the 95 model year they were cast with the oil provisions that allow La heads to oil properly. Once they ran out of those blocks though, they didn't cast any more that way. Later blocks require Machining in the oil galley to send oil up the LA head to the rocker shaft.