1993 Ford Mustang GT Hesitating - Ignition System

Question: "I have installed a 93 Mustang 5.0L HO engine in a 82 Lincoln Mk VI. 2 dr. [Completed 1 July] Due to the A/C and battery, on the passenger side, blocking the normal air induction system for a Mustang engine; I had to reverse the intake manifold, modify the throttle body, by reversing throttle pull boss, and getting a shorter throttle cable from a Crown Vic, to make it operate properly. I have installed an Accel air filter, replaced the rotor and cap, installed new spiral core wires, added a MSD 6 ignition control and Ford TFI blaster coil and new Motorcraft plugs. New dual exhaust system and 02 sensors. My engine [ignition] starts immediately, but is not operating smoothly and lacks punch. Poor - loud and labored acceleration. Some times while driving it is slightly jerky, other times it runs rather smooth. I have added a can of fuel injector cleaner, which has not helped to eliminate the problem. I am still trying to get the bugs out. What is the correct spark pug gap for a Motorcraft 42C spark plugs? I have invested several thousand $ and was expecting much better performance. [If not the ignition system, could it be fuel? I had to place two brass connectors to adapt the 82 to the 93 fuel lines. No other fuel mods.] My mechanic did the wiring and installation. He stays busy and I hate to bug him as he has to make a living. Do you have any suggestions what my problem[s] might be, and how to correct them? Thanks for your help. Mr Tuttle Tecumseh-Ks."

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Technican: Hi: Your spark plug gap should be .044". Sounds like you might have to play with the timing and get it to where it runs good. Due to the fact that you are running a high performance coil you can get your forget your standard timing. What I have done on this high performance coils is set it to the manufactuere specs, then move it 1 degree at a time until you get full performance. It is going to be trial and error. .

Owner: Well neighbor, I will give your suggestions a trial to determine if they work, then get back to you with a reply. I do need and want a fix that will solve the problems that I am still encountering. Mr. T

Technican: Hi; No problem. Will be waiting to hear from from you. Thanks.

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