Mast Motorsports

[fastd]

wondering if anyone has experience with mast motorsports? thinking about the 600 road and track engine for my pro touring build of '72 firebird. will have chassisworks subframe and rear. would like a competent road course and xcross car a few times a year but mostly street car.

i like higher rpm engine than low end torque. this engine is supposed to go to 7000 rpm.

really wondering about the expense vs a gm crate motor.

thanks