[3.9Vert]

Well its times for a good tune up before winter. I am debating on doing the whole ignition upgrade. Accel COIL, the iridium plugs, the high end wires. also would swapping my MAF sensor to a 90MM be a bad or good thing? i have a tuner and that is an option to select is a bigger maf

Would it be worth it or am i just waiting money on it?

[StalkerStang]

I think your wasting money, but what do you plan to do for the car later?

Even with H/C/I or a blower at low-moderate boost, the stock coil is fine, and the motorcraft plugs will be fine as well.

The 90mm MAF will be overkill for it unless you plan on doing more then basic bolt-ons. If you end up doing more then that then the 90mm MAF should work out well for it. But look at getting someone to do an actual dyno tune, and do the MAF transfer and scaler functions.

I would never trust a "pre-loaded" or "mail order" type of tune.

[3.9Vert]

okay, OEM it is. Getting kinda crappy outside to be working on the car.