Between the SOHC engine and DOHC engine, there are VERY few common parts between them. They include the rear main seal and retainer, water pump housing (pump itself is different because of the pulley) crankshaft, connecting rods, and maybe one other small item I cannot think of. The blocks have substancial differences. The only way it can happen is to install an entire DOHC engine into there.
I just got done rebuilding the twin turbocharged engine in my '92 Stealth.