TBI was/is a poor substitute for real port injection that the manufacturers used as a stopgap measure while they developed SEFI systems. Your carburetor probably does a better job than any TBI system would. If you're going to go to the effort of installing fuel injection, why not adapt a sequential port injection system off a newer engine like the Atlas DOHC six?
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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