Quote Originally Posted by pat mccarthy
check the top and bottom gear with a strait edge ? you need to make sure they not running off set. i have check them have had to remachine the bottom gear to get them in line and run a thrust button on the front of the engine and drill with a .030 drill both the front galley plugs for add oil to the thrust and chain set this helps with air lock in the lifter galley if you run the hyd lifters and get the clicking i have never see or had any bust cheap or good set running roller engine with big cams
What Pat say's here is correct.
In every SBC or BBC I will drill a .030 hole in two of the galley plugs.
I would also run the best chain money can buy with steel gears and the oversized pins in the chain.
All chains stretch some but you will be closer with a good chain.
The way you build horsepower is in acurate cam timing.