Today, dollar for dollar, is the 318 faster than the 340 ???

Stock 340s
My 73 car ran 15.0 at 90
My 71 ran 14.6 at 94

That's what compression will do.
My 73 Challenger was a stock 340 and never ran faster than 9.75 in the 1/8th. That's a 15.21 1/4 mile time. I wonder if my 2 barrel teen Swinger or 273-4 would run about as fast.
Good to see a comparison there. My 73-340 ran pretty average then.