I still don't understand why you have to drill your block for oil dipstick? On that 230 engine I installed in my nova, it had that rear sump pan that I sold you and the dipstick in the back. All I did was install my front sump pan, install my orig oil pickup, and moved my dipstick tube to the front location. The block was already drilled in both locations I just had to knock out a plug from the front boss, and move it to the back boss and install my dipstick into the front location.
