440 tunnel ram

What do you mean by a smog 440.sorry for all silly questions new to old mopar stuff.


The numbers on your block say its low compression smog motor, like as in below 8.0 to 1 more like 7.5 to 1. These made for poor performance builds, a small cam is all they will take anything else just slow them down. It's the same with your tunnel ram. Earlier I had said the best thing you could do for this motor is a stroker kit and replace the cast crank and pistons, this will give you much needed compression and even with stockish heads 450 to 475 hp with 550 ftlb of torque. Then your tunnel ram will work for you and if you put heads on it another 100 hp. You desperately need compression and a refresh on the motor before you blow it up.
Good luck