The only problem with buying premodified cars is that there is the possibility that they have been messed with. We shall take mine for example
I bought mine for $4750 (guy was asking 5500) It already had 2 chamber flows, k+n, BBK progressive springs, FMS 10.5" clutch and a B+M Ripper shifter. It was in nice shape and it had 96k when i bought it. However I have had to replace basically the whole cooling system except the water pump, the rear main seal is leaking, and I just now discovered that my oil rings are leaking causing my spark plugs to become fouled after a year or so
The guy I bought it from had alot of crappy quality work done to it that I could not have noticed by just looking at it. Oh well it just means I have stuff to fix and improve