Fred Brewer made them.His son is Randy and runs in some of the Mopar and pro mod events and a amc with a Blown Hemi.Fred quit making them cause people did not know about them and he was high bexause of the volume of sales.These heads flow [email protected] lift.The mtr is a 499 and the car has a glide in it and were having problems puttin the hp to the ground.Best 60ft is 1.23 5.500 in the 1/8th @ 124mph