May i ask where you sourced your info....both auto and marine injection are sealed systems so to speak...?????


Now the tank return system is regulated.

This thread dormant for 10 mos before rainman dug it up to enlighten us, lol!

You could make a list a mile long of these old wives tails bs. Iirc the j tubes are not mandated.

Whew! That's good to know... I don't have those either...:

Hopefully Rayman390 is not any of our Insurance rep's.

Some are...Okay, many are.

Example: Go look at a 1987-1995 GM 4.3/5.0/5.7/7.4L Truck Distributor and Coil and Throttle Body Injection unit. Then, go look at a Mercruiser EST / Voyager Ignition and Mercruiser's Throttle Body Injection unit.

Running one of those now. Cheap, reliable, easy to find parts, and great timing curve

my crusaders use the delco EST dist/coils, all std GM except the modules are different as they dont use a ECM to manage timing, stock module will not work...tried that on another project !

Delco D1965a is the module, GM # 10482830. Most GM / Delco brand modules have a curve built in as 'limp home' if computer dies. Most Wells, SMP, Echlin, etc modules do not have the curve from what I've read (and the one wells I tried did not advance at all). Never tried the Sierra, crusader, etc modules - the Delco is much cheaper than any part labelled marine.

thanks, I also tried a MSD replacement EST and would not advance either...