I just built my 383 sbc 525 hp and it pushes my 24 excalibur very well. I have yet to pass 70mph on the gps but till i get better tabs i better not try. I get a little out of shape after 67 or so. I havent been able to get a very god high speed pass because i built the motor before the bravo. I have an alpha 1.62 to one and the new motor eat it up in 3 weekends. I didnt want to build the motor till after i got a bravo but the crank broke in my 350 and thought i could just take it easy on the alpha and get by for the season. I was wrong.