Cutting to the chase - you want to be able to play cassettes in your truck at the lowest possible cost. With that in mind, there are many (repeat, many) outboard devices that will play your cassette and convert to a digital USB output. Here is one:

https://www.bhphotovideo.com/c/produ..._to_m p3.html

There are also remarkably inexpensive FM transmitter adapters that will connect directly to the above and transmit right to your existing radio. One such:

https://www1.crutchfield.com/p_142IP...DS.html?tp=121

Gonna be a lot easier than surgery with a dubious outcome, and will be adaptable to any vehicle with an FM radio.

Peter Wieck
Melrose Park, PA