solid copper board?
Plan very carefully where the lines will be, where the parts will fit, and make an accurate sketch.
Make sure the copper is very clean.
You then lay down some special tape on the copper, the tape will have circles where you will want to drill the holes for the insertion of components.
So once you have these tape lines on the board, make sure it is exactly how youwant it,
and then they have this special solution that will eat away the extra copper, it dissolves it, everywhere except where your lines are placed. You will have to lightly agitate the fluid over the board. Use a bowl or something that you do not care if it gets ruined, as in, don't use your wife'* best China dish.
After several minutes, the copper will be gone. Clean the board of extra solution
You now remove the tape, and the copper below the tape will be intact. You can now drill the holes where you want to place components.
I do not know where the copper-eating solution is available, perhaps radio shack?
ALSO - when laying the special board tape, make sure it is tight so the solution does not cause breaks in the copper track lines.
OR - you could get a pre-drilled board and just solder wires everywhere, but that is a sloppy way. When shopping for this stuff, the clerks may not know what the copper disolving solution is, they are not real bright, they are just there to sell the stuff.
1999 LeSabre, 3800 series II engine.