I am working on my 94 Blazer and I am going to change things up a bit. The truck has a 383 in it with a very mild cam, World Product SR Tourqer heads, running the stock intake ported and 2" TBI bores. The TBI has 2" bores with all the spacers...etc running 454 injectors (80 pound per hour). The pump in there now is a GM later model truck pump for a Vortec. I have the tank out and I am going to swap in a Walbro 255 pump, pull the injector pod off and mod the FPR to make it adjustable, also going to stick the stock 350 (55 pound per hour) injectors back in. It seems like I have fought the tune on this truck since day one. Mainly cold idle, winter time, runs really rich. My question is what would be a good starting point to set my fuel pressure to with this setup. After its set I will leave it alone and work on the tune.
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