Trap RPM

[ont_guy_38]

I am considering putting 4.56 gears in my truck but am worried about the rpm at the end of track and if my motor could handle the rpm.The motor is a 350 standard bore,flat tops,air gap intake and vortec heads with a fair amount of porting done to them.The cam is a Comp , duration 228 int ,234 ext, lift int 480 ext 499 with 4/7 swap and 1.5 ,1.6 rocker combo and holley 700 carb . I don't spend much time at all on the highway mostly just cruise nights and the odd trip to the track which is about an 40 minute drive .I have 29.5 inch tires but might go to 28 inchers eventually . I do have a set of 3.90 gears right now to put in it but wondering if i should just go for it and go deeper .The motor came out of a car with 4.11 and a 26 tire so I'm thinking this combo would be about the same . I really wanna do it but don;t want to be sorry I did