1971 302 upping horse power?

I have a 1971 ford Torino wagon. Has a 302 with auto trans. No exauhst. Motor has mild cam and bored.30 over with a stock 2 barrel carb. I wondered how much horse power a new intake manifold with a 4 barrel carb will Ruffley add. And how much headers and exauhst would add also. Just looking for a ruff estimate

Replacement Cost Camahaft?

I would like to replace the camshaft in my 76 Ford maverick with a 200ci Inline 6. How much would the cost be to take it to a shop?

Misfiring problems on 1997 ford club wagon (van) 5.4 Lt v8?

I just bought a 1997 ford club wagon. 5.4 v8. When you match your speed and try to cruise my motor causes the whole van to vibrate hard. I think it's misfiring. It doesn't run rough when you accelerate or slow down. Everything else about the van is perfectly fine. This van has 283k miles on it. The gas sat in it for 8 months, i put some seafoam in it and high octane stuff. Could you give me a list of things you would do to fix my issue and any other maintenance you'd do to a old van? I'm thinking my misfiring problems is from bad coilpacks or injectors.

Does the US have any really high end luxury cars?

I don't mean things like Corvettes and Ford GTs, like things that really stand out and would be on par with the likes of new Lambos, and McLarens, and Maybachs and Bentlys and Buggatis, and Maseratis and Ferraris. I know like none of those companies exist on their own but is there any thing like those that are American made?

What vehicle should I fix up to be my first car?

I'm about to turn 16 and get my drivers license. I wanted other peoples opinions on what vehicle I should fix up. I have a choice between a '74 Chevy C10 with a '72 front clip, a 78 Chevy camaro and a 87 Ford dump truck. They are all in bad shape but have straight, un-crashed bodies. I've been leaning towards the camaro because it is in the best shape, actually runs over and has the most power. But I have my doubts because I want something able to haul stuff around. I will probably fix up two, but which should be first?