My brother is working on a truck for a friend, he is installing a full built trans, fuel system, studs, springs, cp3 and 3.3's. The truck is a toy, he drives it to work a few days a week but it is only 10 miles round trip. He never tows or pulls only dragraces. He wants the biggest single he can run (tried talking him into twins but no dice) The only big singles we have much experience with is on 6.0's and they spool like crap lol.. We were thinking about a 66 or aurora 5k but he wants bigger, how big do you guys think we can go with it still being somewhat drivable?? thanks guys
p.s. we are also at 6k feet so that also comes into play

 

I think a AK5 is about max or something equal, with that set up, it will really hard to spool if he goes bigger. 3.0 is alot of charger to spool. IMO

 

with the air up there i would stick to ur own suggestions. If he wanted bigger i wouldnt let him cause it would be no fun to drive

 

i just put on a 3.0 s-400 on mine it spools decent but you need alot of fuel to keep it happy, I would stick to a a5k you can make good power with one.