Ray a 230 is not always the same 230 in a car and a truck. Some external mounting points can vary as in the case of the boss for the clutch cross shaft. In one application the block side in the area under #5 cylinder might be used and on another vehicle the location is at the tail end of the block next to the bellhousing. It's a pain when you find this out after going through all the work but it isn't hopeless. I would leave the truck frme mount and linkage as much alone as possible and make up a bracket coming off the side block out of 1/8 x 1 inch flat stock to get the engine side pivot ball into the clutch cross shaft. The engine side pivot ball may be screwed into the block. Remove it and after you make a bracket drill a suitable hole in it to install the ball and add a 1/2 - 13 nut on the ball stud with some locktite or a good lockwasher.
If your pivot is welded to a bracket you can add to the bracket with some flat stock and welding to reposition it or just get the threaded cross shaft pivot ball and build the new bracket.
The last thing I would do is modify the chassis location. You'll end up making more work for yourself as now the clutch pedal rod and the clutch fork rod will most likely need to be fiddled with too.
Using a car block in a truck chassis it is pretty unlikely you will find an original GM piece that will bolt onto the block and solve the problem.
