It is all about condition. You can check out this site to give you an idea.
http://www.nadaguides.com/Classic-Cars/1968/Volkswagen/Transporter/Pickup/Values
In order to know what the value of a 1968 Chevy pickup is worth, you will need to know more details about the truck. You will need to know the condition and miles of the vehicle.
If, by ECU you mean "Engine Control Unit", I don't believe a 1968 dodge pickup had one.
$1,000,000 in 2016 equals $143,325.23 in 1968.
$980,000.00 in 1968 had the same buying power as $6,837,595.87 in 2016.
1968
Try nada.com
ALOT
127" (same as a long bed pickup)
8 cylinder 360
To determine how much $10,000 in 1968 would be worth today, we need to account for inflation. Using the average inflation rate of about 3.9% per year since 1968, $10,000 would be roughly equivalent to around $77,000 to $80,000 today. This is a general estimate, as actual values can vary based on specific inflation calculations and indices used.
4.5 million dollars in 1962 was worth about $35.3 million in 2015.
Not without major fabrication.