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Well, I am starting my TPI swap into my 77 Blazer. As I was working on it tonight, I was wondering where you all put your ECMs... I can't find a good spot for it.
I can't fit it in the stock carrier (which actually bolts in that location, to the underside of the dash) right now because I still have the swappable PROM carrier in it.
'77 won't have the mounts unfortunately, GM tack welded a couple of brackets there.
I need to move it (put the right PROM in) because it's interfering with the heater control cables/levers back there.
If you are using a Camaro wiring harness, you probably have enough length to run the wires under (or through) the truck and under a seat or in the console, depending on how much you want to cut up or how nice you want it to look.
Hmm, actually, wonder if you could make a bracket that just stands the ECM up along the inside lower edge of the dash? I know the drivers side has plenty of pre-drilled holes for mounting various items, and I believe there is plenty of space to the drivers side of the glove box...
I used heavy duty velcro and stuck it to the heater box, just above where the foot vent comes out above the transmission hump. I have the connections facing up, and just enough of the other side of the ECM sticking out that I have easy access to the prom chip.
You can leave the factory foot courtesy light where it is, it just presses up against the ECM housing. Makes for a very nice light to see prom chip orientations at night too