For our Magnum gas engines a throttle body spacer only takes up space and causes us to spend extra money that we shouldn't. Spacers are designed to cause a swirling action nea the point where the fuel enters the air stream. However, in our Multi Port Fuell Injected (MPFI) engines, the air flows approximately another foot before reaching the injectors. By then, any action obtained from the throttle body is compeltely gone and you lose the benefit. Now, for throttle body injected (TBI) engines I have heard some good things about TB Spacers.

Another item that can help your 318 would be a new set of Harlan Sharp 1.7 roller rockers. You can go adjustable or non-adjustable (non-adjustable was my choice).They will increase the lift of your valves thereby allowing more air and fuel into your engine and more exhaust out. Combine them with a CAI (your choice), fastman throttle body (50mm for the 318), the stock exhaust headers are pretty good so save replacing them till last, a Magnaflow High-Flow cat converter, and a good Flowmaster Cat back exhaust (I recommend single exhaust to keep cost down and keep the torque lower in the RPM band).

As I said in an earlier post, in and out. You gotta consider that when changing the air/fuel areas of your engine. Once done there, you can look into a MSD6 series ignition system, 8mm or larger quality wires, Autolite 3923 sparkplugs, good brass contact cap and rotor, and a MSD high capacity coil such as a Blaster series..

Good luck.

 

Best bang for the buck : heads , intake manifold , injectors 24lbs, cam , roller rockers , gears , TB , ingition , upgrade the pcm , mopar , B&G ,SCT .oh yeah you have a 97 you can use the msd blaster replacementcoil #8226 , msd 8.5mm plug wires , autolite 3924 plugs , as far as exhaust goes will depend on you .. cause what works for me wont work for you..