[decooney]

Yep, it looks to be an Arntz. There are several signature indicators, wide trans tunnel up front, interior and sewing, piping, very distinctive door panels / door handles, door pockets are all Arntz signature. Low slung body shape with low shape arch behind seats and narrow top for rear quarters - not wide or extra flared like a 427 SC, more street looking shape. The side pipes with triangle bolt mounting, the obvious engine position - set way back into firewall and the distributor 1/2 exposed for chevy engine. Some had the center mount fuel cap like that, more like 289 than 427 car. The older stock fillers on Arntz cars were smaller but this may have been changed later. Note the added 1/4 sections and hood rests for hood to rest on, single hoop mount tube bumpers, typical wheels/covers back then, appears to have the original header tubes have the original style Traco air injector tubes blocked off, specific throttle linkage and steering shaft on driver over footbox looks familiar, and how the foil is placed up to the edge on foot boxes. And, of course a signature Chevy 350 engine - many came with Traco 350s. Can't see the expansion tank, but those were also a signature item on the Arntz Traco 350 Cobras. Check to see if it has the MGB front end or upgraded coilover setup, Jag differential, and the other key giveaway is the giant box "X" frame underneath. Then, weigh the car, they come in kinda heavy 2800-2860 or so with iron SBC. But, drive and feel solid when tightened up and sorted out. Can be really neat cars if sorted out well. Helped a friends on the Butler/Arntz cars. Good Luck.