Well to each his own,after running in the 11's yes 13's are VERY slow,and as i stated before he's not getting anywhere near the 10's with a 318 unless he spends a LOT of money or uses a LOT of spray..second of which anyone can do...
I agree with the concept of looking elsewhere for 10s on the budget he is on. It can be done, power wise, with a 318, but it will not be financially feasible. Something along the lines of a 360 based stroker with RHS, or maybe even worked Magnum heads, and more than 10:5:1 compression may be a starting point to at least work in the right direction.