need the XT experts on wiring between 87.5 V's 88 onwards

Maybe I should start with my first suspicion....

distributor to loom connector plug

I think the stand-out individual 87.5 model had black round 4 wire connection plugs to set them apart from 88 onwards that are white

I suspect some 88 onwards owners out there can be as funny as myself and suggest that theirs are black coz they are so dirty

I would appreciate anyone's input

My upcoming task is in prep for propane (LPG) becoming harder to obtain. Prices have been reasonably stable compared to wet fuels in the past year.

It is the availability of it - part of which is tanker driver participation, another part is the bottle filling industry keeps their customers priority over fuel station supply

I run a Series 1 EA82T ( normally Series 1 3 plug ECU) exclusively on propane LPG , so no ECU or wiring loom, just the stand alone distributor and knock system.

I have found a spider intake with it's plugs. I do not know if it is 87.5 Series 2,  4 plug ECU or the more common 88 onwards Series 2,  4 plug's intake

I have also found a complete XT loom, from the ECU plugs to the engine plugs on the spider intake. Again, not know if it is 87.5 (Series 1 of the 4 plug ECU) or 88 onwards 2

Fortunately I have an NA 1989 mpfi series 2 , 4 plug ECU with pig tails of the loom to compare with my XT loom

The fourth plug with bigger pins, of the loom has one extra wire (green) over the known NA 4 plug ECU - so think the loom is turbo

another think the loom is turbo is it looks to have three round plugs for boost control and maybe that resistor thing for injectors ?

I have another ECU from a 1988 or 89 XT turbo

further searches should reveal an answer to top question when i find a distributor.

I was gonna go EJ and had found a donor but owner now seems reluctant to communicate , so may have sold it. Don't know ....so i thought why not go through the pain of wiring up an EA82T for wet fuel.....as I have a fully rebuilt spare and other spare bits .... means no exhaust or colling changes