i know you pay for what you get...

The headers would make or break that kit. Gotta see the real ones, and if they are close to those LSX looking headers in the pic, there is no way they will clear A body inner fenders. See if you can get pics of the real Sbm headers. That would be interesting to see.
We had to modify Chevy turbo headers for my buddy's twin turbo 318. Had to weld on the Dodge flanges and reshape the tubes. But it worked out great in the end.IMG_20161203_204059108-2672x1503.jpg