Denny and Henry---Just thought that I would clarify something a bit. I have built a number of rods in the past, and they all ran small block Chev engines. The cars I built before had custom frames which I designed, and consequently I allowed enough extra stretch in these frames between the firewall and the front axle that I was able to run factory stock front waterpumps and multi groove crank pulleys with no clearance issues. All I needed to do was fabricate a hood top and sides that were about 3" longer than stock. This time around, I'm trying to stuff everything into the space alloted by an unstretched model A frame. The firewall is recessed 4" in the engine area, but thats all the room I have available. I know that some of my questions may seem a bit naive, but its only because I haven't ran up against this type of clearance issue before. I am sure that there are hundreds of model A's running around with small block Chev engines and stock length hoods, and I appreciate the help you guys are giving me.