I actually do just that. In my T-Bird I have a qurterhorse installed and every now and then I'll make some changes and see how it runs.
75 Maverick, 5.0EFI, trickflow twisted wedge heads, Explorer intake, 24# injectors, E303 cam, 70mm T-Bird MAF, 65mm Explorer TB, T5 trans and 3.80 rear.
94 T-Bird, 4.6 PI heads and intake, 80mm lightning MAF, 24# injectors, 4R70W trans with Mark VIII converter and 3.73 gears in rear.
2004 F250 super duty 5.4 untouched and used to tow anything I blow up back home.
ASE Master Technician and Advanced Level Specialist.
It's not what I know, It's knowing what I don't know.