Stock Block series

Our local track has started a series called "Stock Block" heads up racing.

Rules;
Stock crank
stock block
200CC intake runner max on the cylinder head.
Any cam, rods, heads.

They have a class for small blocks & one for big blocks.

Well, we decide to take the Demon out in bracket trim.
We qualify 2nd out of 10 cars @ a 11.40.
3-10 was in at 11.49-12.02.
#1 was a 351W Fox body Mustang @ 10.95!

Well, we made it to the final & got beat by this Mustang.
Am I that blinded by MoPars that I can't see a 351W running that fast?
This same guy ran the power adder class (NOS) & went 10.02.
I still think this guy was illegal, but there was no provision for inspection, other than the racers word.

So, I'm putting together something just to clean this guys clock!