i have a 73 cuda with a 440 source rotating assembly .it's 540 c.i 10.5-1 and rev it 6800.As long as you have it checked ,just like anyone elses. you'll be fine .my car is 3860 w/ me in it and i run 10.00 t0 10.10 depending on weather at 136-7 mph .it's been together for 4 yrs. no issuses. Remember (1)People will complain about anything and (2)you get what you pay for.their stuff is'nt crap but it's not gold either. 5,300 stall appox. 700 hp