Bent up stuff
When I put Edelbrock heads with COMP CAMS Ultra Pro Magnum rockers on our 383 I had to order custom length pushrods. The ones that COMP CAMS said would be the correct length with our setup was wrong. (they were too long) I bought a length checker to establish the right length and ordered new pushrods from Smith Bros. So, you can't always get things right dealing over the phone with manufacturer tech. It's best to inspect, check, and confirm that everything is done right.
