Hi. I have a question about changing the header panel on my 1984 cutlass to a 1987 cutlass. I know the will bolt right up. I just cant figure uot the headlamp wiring. The wires that go to the headlamps are different on composite lights compared to regular halogen 3 prong plugs. I have the plug ins for the composite lights. Witch wires do I need to hook up? Please help. And another question, I have an opportunity to buy a 1973 350 olds with a 400 trans. for about $200. Would that be better than my factory 307 with a olds/buick 350 transmission? About how much power can I expect to have. I am only going to freshen it up abit, add intake, cam, and aftermaket carb. Thanks.