I know the 1977 351m was given a horsepower rating of 161h.p.@3400r.p.m. but I was wondering what you guys think my engine has. The engine runs fine and is in good shape. I recently gutted my catalytic convertor and put on a cherry bomb muffler and I was wondering what you people think my horsepower might be at now since the mods? I can definetly notice an increase in acceleration.

By the way, my info on the bottom says 79 Bronco but it has a 77 engine in it. Also, disregard the carb and intake info because I put the stock equipment back on.