Hello everyone, I have a chevrolet caprice with an lt1 engine.There are new gaskets in it, and the XR264HR-12 07-501-08 cc camshaft has been changed , there is also a roller rocket 1.52 and valve springs cc max lift 550 and the firmware from lt4 is installed and not much has been changed.At about 650 rpm, the engine is shaking and idling is not very good.Maybe someone can make a firmware for this camshaft?I can send my bin