Have a 82 720 4wd with a z24 that I rebuilt and swapped. I have Webber 38/38, did away with all emission and unnecessary vacuum lines, also mild porting. I came out with a ton of power (more than expected), example I could burn out 33 mud tires even with the high geared stock exhaust, and with the 5 speed manual transmission 5th gear pulls great. After giving this truck absolute hell I blew the head gasket. Surprise! My question is what are the specific differences in the z24 and z22? Stroke/ bore and is one head better than the other and interchangeable, are the intake/exhaust manifolds same or is one better? Basically can you mix and match the two motors to create a perfect mix of power and dependability? Thanks in advance