I know what you're saying about saving a few bucks but you might want to consider that pushrod length is part of the whole valve train geometry. Your lifters, heads and rocker arms will all effect what pushrod length you need. The best way to determine pushrod length is to measure for them. (you can check what you've got this way too!!) Put some blue dye or use a sharpie and color the end of the valve. Put the lifter, pushrod and rocker in place and rotate the cam to move the valve. The rocker arm will rub the marker off the valve stem. This is where an adjustable pushrod comes in, you may have to adjust the length to get the wear pattern where you want it to be. When it rubs in the middle you have the correct length for the pushrod. Measure the pushrod and order accordingly. A pain in the rear true, but this way you'll get the most out of what you've already spent money on!
