12 second 340

My brother has a 360/380 in his Demon.He bought the motor used after a freind decided to go with a big block.Its been in his car for about a year with no problems.But as far as bang for the buck,I think you can build a lot better engine cheaper.His best times are 12.50s @ 107.I have less than $2000 in my engine and run 5 tenths and 5 MPH faster.