im running a 3 rib jdm 4age and wanted to know how much the bottom end can take before they normally call it quits? plans are to shave head a bit trd head gasket cams etc. they dont have oil squirters and that but are they that much worse than the 7 rib blocks?

assuming all cooling and running a quality oil would my motor last a whole track day reving up to and around 8krpms? i did a comp test and everything looks good. numbers all even. number depends on gauge.

what do you guys recommend to improve bottom end?

thanks all