What's the Diameter of the Holes for the Pushrods???
 

I need to buy some magnet pens to do my cam install tomarrow. I found some but the magnet part is really wide and I'm not sure if they will fit down the hole to get to the lifters. Anyone know the size of this hole? Does it taper at all or is it a constant diameter? Thanks.

just go to autozone or something and pick the the pen magnets that are near the front counter. thats what i used. or go to home depot and get some 1/4" aluminum rods about 22-24" in lenght and use them as a make shift JPR tool.