Join Date: Mar 2002
Location: Austin, TX, USA
As a general rule for GM, #1 position should roughtly point in the direction of number one cylinder. BPOS is right - technically it doesn't matter. Although, in some positions the vacuum canister can prevent you from adjusting the timing since it will bind up on the intake manifold or other stuff.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI