Its fine to do with rpm and some timing. a cam helps, a big cam makes it extremely easy to tow with.. used a dp2 with one and it would make 20psi at 1300 rpm.. 22*, 370's, 022's., 4k, 180 pump. made 540 hp lilke that..
I towed close to 10k with a HTT 64/71/13ss, 5x.014's and 024 dvs with no problem. The 4.10s in the rear help keep rpm up but as long as I keep the r's above 1600 it ran nice.