Ecotec and l67 crank is exactly the same ..the diference is the l67 shaft is balanced to the pistons/rods and flywheel..the l67 flywheel has an extra weight on it ..hence the balancing
l32 heads can be machined for the injectors and used on an l67 .the l32 heads have marks in the casting where the machining needs to be done. apart from the injector housings the heads are the same.