The Cobra/explorer/gt40 are basically the same intake. Cobra/Explorer are just cast (cheaper) versions of the gt40.
They are entry level performance intakes. You will still pick up power by bolting one on. About 10 hp, and it is a top end gain, maybe not the best in a Jeep. The heads on a 302 are the key to power. The stock roller h.o. cam can make good power and better torque. Sleeper too.