If the manufacturer angles the fire wall 3degrees, I am suppose to offset the engine so that the crank shaft comes out center of the cowl, right? The current plane I am working on now, the manufactuer drew the center lines on the firewall with the vertical line offset about a 1/4 inch, but when the engine is mounted there, it does not come out of the cowl centered. is it critical I leave the engine on there marks, or center it in the cowl?

Thanks !