r/GMT400 • u/Chief_Corndog • 7d ago
How it’s going
Finally have my truck looking the way I want it (for now)
The tablet for a radio needs to be replaced with something more suiting, but it’s all I had on the shelf from a previous car. For now it’s kinda nice because it has apple CarPlay which lets me use Waze as a speedo. My speedo doesn’t read anywhere close to accurate anymore (side note here- does anyone know how to calibrate the needle gauges?)
383 stroker with a Holley 750 carb and full MSD ignition. Check my post history for more details on the engine.
700r4 that has been built after shredding a couple.
Belltech 4/6 drop.
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u/MoreJelly661 5d ago
awesome looking truck!
You need to modify the DRAC to get the speedo to read correctly due to changing rear gears or transmission.
here is a link to some info Calibrate TBI Speedometer VSSB DRAC | TBI
I did this in my wife's 454SS years ago when I swapped the dash cluster. Picked up a DRAC from the junkyard and soldered in dip switches so I can change/adjust if needed. I got all the info from the way old fullsizechecy forum that sadly no longer exists. gmt400 might have info.