Can a 93 ranger 6 cylinder and transmission fit in 92 with 4 cylinder?

No, a 1993 Ford Ranger 6-cylinder engine and transmission will not directly fit into a 1992 Ford Ranger with a 4-cylinder engine without significant modifications. While the chassis is similar, the engine mounts, transmission mounts, and potentially the crossmember are different. The 6-cylinder engine is physically larger and heavier, requiring different supporting structures. You'd need to fabricate new mounts and possibly modify the crossmember to accommodate the larger powertrain. It's a major undertaking, far beyond a simple swap.