I agree with a lot of what goodfella says, 1/2" fuel lines, the gages, doing it right, the risk of a bad install.
One of the beauties fo the whipple system is that it is calibrated and computer controlled when you bolt it on and the timing, knocksensor, fuel curves are all there. Brand X leaves it to the installer to tune and that is a significant disadvantage. Dustin has Dyno'd his systems and it is well tested- you would be throwing money away to pull the engine and dyno it.
With regard to 100 hrs- I have to disagree- check your compression against specs, if it's good you are good. My dodge Pickup's (And my former vette and Goodfell's vette for that matter) computer lets me track average mph- usually 37 but we'll call it 40 to play it safe. Lets say i bought a new dodge, gas engine, towed max gross wt since day one (assume its a wrok truck) at 100 hrs you've got 4000 miles- working the truck hard. Now take into consideration that the marine engine operates at cooler water and likely oil temps (or at least as cool) allthough in a similar load pull environment.
Are you going to pull your truck engine and freshen it at 4000 miles? Let compression and oil consumption be your guide. If you really want to be careful have your engine oil analyzed once a year and they can tell you the health of your engine based on wear metals present in the oil sample. I'm talking about mild big blocks here- high strung engines are different. There have been several posts about 600 hr boats still having excellent compression.
You also don't need to pull heads and stud them and upgrade gaskets- At least not with the Whipple- if you think your self tuned system may detonate then you do have cylinder pressure issues. With that said- when I do freshen my engine, I will choose to invest in better alloy bolts and the correct felpro gasket and probably inconel exhaust valves- for piece of mind.
Don't take it from me- speak with Dustin or Andy at Whipple and you will get the real skinny. Good luck and happy boating.