HAVE 3 OF THEM RUNING RIGHT NOW AND THEY RUN MUCH BETTER AT LOW RPM THAN THE REAL DOHC SET UP, WITH THE DUAL INTAKE RUNNERS,, JUST INSTALL A COMPLETE 3.2 DOHC CYL HEAD ASSY AND USE YOUR INTAKE SYSTEM , EX, BOLTS RIGHT UP AND SO DOES THE TOP END , YOU WILL NEED THE T BELT AND THE TENSIONER FOR THE DOHC ENG , NO WIRING CHANGES AT ALL THE TOP END DOESN,T KNOW WHAT IS ON THE BOTOM END , NEITHER THE ECM, IT RUNS FINE AND WILL EASILY PASS ANY EMMISSION TEST , WILL RUN ALLMOST AS GOOD AS THE NEWER 3.5 AND WILL RUN AWAY FROM THE NEWER 3.2 , BY USING THE SOHC MANIFOLD ON THE TOP YOU IN EFFET MOVE THE TORQUE CURVE DOWN CLOSER TO 34=35 00 RPM INSTEAD OF THE 3800 TO 4 K IT IS QUITE NOTICE ABLE 95 HEADS ARE THE LATEST YOU CAN USE THE 98 AND LATER HEADS WON,T FIT YOUR BLOCK JERRY