The tailgate band of my K5 was completely shot, it had dents and holes from a spare tire carrier and other stuff.
I made an aluminum reinforcement plate with new mountings.
Made the old band as straight as possible and glued the reinforcement in.
Used aluminum based filler/bondo and sanded it to...
Welcome from Austria. Post some pics.
Here are rpm calculators which gives you ball park numbers for the rpm.
https://spicerparts.com/calculators/engine-rpm-calculator#more
https://purperformance.com/p-29669-rpm-calculator.html
You can wrap the exhaust pipes to the cats to warm up quicker and keep the exhaust gas temperatures high. After market race cats are pretty slim and could be mounted closer to the headers in your system.
Welcome from Austria.
Found these on ebay:
https://www.ebay.com/p/658172768?iid=266819773518&fitmentTarget=Make%3AGMC%7CModel%3ATruck
https://www.ebay.com/p/658172768?iid=276805567935&fitmentTarget=Make%3AGMC%7CModel%3ATruck...
The Mar-K states the trim is made in Oklahoma City, that's the reason for $$$$$ pricing. Would like to have a trim part to see if it's worth the money.
Description says 1979 C20 with a 250.
Should be L6 and a Varajet 2 if everything is stock.
https://www.carburetor-parts.com/rochester-varajet-technical.html?srsltid=AfmBOoo1iCpko7be6hfT08iUn8-hIgQ35tzaDcqgsHKn29lPZmGa59uI
You mean electric choke conversion ?
Install the heated spring element, adjust it. Check that linkage is moving freely. Plug the heat pipe inlet at the choke housing otherwise you create a vacuum leak.
If I forgot something more knowledgeable members will chime in.
Carb manuals...