there are several issues with too big of a cam
- will require new valve springs that are matched (most cams come with a recommended spring spec)... if you are changing the springs you might as well do new valves. usually with lots of miles the exhaust valves especially need to be chucked out. heads need to be hot tanked / valves seated. by the time you do porting also you are at $400 per head or more. so you have iron heads weighing much more than the assembled aluminums which already would have better springs.
- big cam means it needs higher rpms before it's power is unleashed... so that means you need a high stall converter, better oil pump, rockers with better oiling, etc. more money needs to be put in for those things. a mild cam using stock springs with lower rpm range can use the stock converter and you dont need to have hv oil pump, and can use the stock rockers for now.
what you could do is get the intake, headers and carb now, run the 360 for a while then when you get money saved up do an engine upgrade. new cam / oil pump / converter maybe even a stroker kit. have the block blueprinted / balanced etc. this would be the time to get the aluminum heads because you will be changing pistons, and matching the pistons you choose to how many cc's your heads have
you can reuse the intake, maybe not the carb. that's why i said get a used carb and do a nice rebuild on it. it's not as hard as it sounds and it's kinda fun actually. there is a great guide over in the fuel secton. so later, when you upgrade, you can get a larger carb and do the same thing.
so that way you can use the car now without spending a whole ton, and have the stuff ready to swap when the time comes. you could even pick up a 2nd 360 block and use that for your build. so you can drive your car right up until the day the new one is ready
p.s. yes the voodoo has an 02 (super mild) 03 04 etc they probably have one that would be perfect for a standard 360 and later you could go higher