Help me get my slant running right

it's a 1bbl carb.... thats all i know..... i know it has vacume on the port but didn't check how it reacted to the throttle..... will check tomorrow.... will take a close look at the carb for leaks too..... thanks for the input... really... i know a guy who has a 73 with a slant close by... i think i will see if i can borrow his carb.... the swap wont take long..... why the hell is my timing mark 90 deg. apx. off? thanxxxx