The new Dart heads require pushrods that are 0.20-0.25" longer than stock, they recommend measuring for an exact fit -- but fail to mention how to do this.

The motor is a 4 bolt Mark 4 BBC and I'm using around a 0.55" lift hydraulic cam and long slot stamped rocker arms.  Is there a normalized height or angle you set the rockers to so the pushrod length can be determined?

Thanks, Mark

Good info from Comp ! Mark order or buy a "checker" or if you have Two old pushrods (long and short) you can cut them in half and thread in a stud to creat a length checker ,once you get the geonmetry right then simple measure the OAL and order accordingly , Summit usually has a good selection ,we buy from Smith Bros in Oregon ,inexpensive and custom lengths, great service! Tom

BTW I think your going to find the length needed is considerably more than .025 ,more like .250 (1/4 inch) and your right Dart doesn't put that info out there but valve train geometry should be checked on every build