Hello every one , a long time ago i built 1980 custom 1197 , Well the other day I bent an exhaust valve and cracked the guide not paying attention during degree in cams and changing a shim , my fault for not paying attention, so i had to pull the head for the repair, I pulled the block to put a fresh base gasket and found cylinders and pistons had some scoring so im probably going to re hone and buy another set of pistons unfortunately $$$, I had been using foam filters on velocity stacks and later switched to APE pod filters none of which were ever oiled ( not the best decision ) , The machinist believes this is the cause , hard to say MTC instructions were followed, the block was processed at APE which do great work , the block was washed and bore brushed , I checked ring gap before installing top end and every thing was spot on . I am tempted to do a full tear down to install a 6speed transmission I had gotten a along time ago its been sitting in a box collecting dust , I had planned on doing this next winter , Not sure on that yet , are you guys coating piston skirts on assembly ?
