who are p/r, i would not bother with the 5th injector kit, i had one, it was overfueling a t25 at 18psi and i had the full spec engine that i'am running now, they used a ford cold start injector with a metro oil pressure switch, it came on at 5/7psi, i'd say if you had to use one, have it come on at about 16/18psi through to 22psi on a t3, this would still overfuel, but would protect it up the top end and cool the pistons, i have mine set up to run rich up the top, this is what andy @AMT engines has done, so that i can run a flat out top speed run, this can bugger the plugs up, in japan they run the 300zxtt that rich that they have to change the plugs after every run.
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 fj20/et a replacement for displacement 
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