Can I run a 4-ch. amp and just dash and door speakers thru my factory cassette?

[tireburner163]

I've seen 6.5" speakers fit into the stock opening on fox bodies, but I'm pretty sure the larger magnets of the MB Quarts will require some work. A spacer made out of MDF should do the trick, although you might have to ditch the factory speaker grills.

You CAN wire the factory head unit into the amp. Just use the speaker level imputs, splice your factory speaker wires into them. However, I think it's a waste just buy quailty componets and then use the factory HU. The sound quality of a nice aftermarket HU will make your set up so much better.

Let me know if you have any more questions.

-Josh, aka the tireburner