I can't get starter keep from grinding on car it is a high torque , I can shim it an it might start ok for a couple of times but don't never sound like a Chevy should sound it is a 489 bb 9.7to 1 idk if this could have any thing to do with it but I am using regular bolts not actual starter bolts could this have anything to do with it. Also got new spi flywheel sounds awful when trying to start