I did both and saved some money along the way. I think it would be impossible to cut carpet for the front, because it doesn't lay flat so I ordered a custom fitted rubber mat that covers up every inch the carpet used to. $55
For the rear, since it is flat, I got a big slab of black carpet from an outlet store here for $10, and cut it myself. It took a while, but looks good and was dirt cheap.
$65 is way better than giving LMC or JC Whitney $250!
'73 K5
Chevy good...Ford bad