From the limited information I know when the HP and TQ numbers are close it's typically because either the heads don't flow some big number, or its a lower RPM build. I built my wife a 408 (351W stroker). When we dyno'd it, it made like 510 TQ (I forget the RPM). and 535 HP at 5800. It's just a basic build, 10.7:1, AFR 185 heads, Victor Jr Intake, .571/.592 solid flat tappet cam. The engine builder said he'd really like to see the AFR 205 heads on it, but I compared the 185 vs 205 and even talked to AFR and the only way the 205 would be beneficial is if I got a bigger cam and twisted it more RPM. She shifts it at 6000, traps at 6200. The motor has ran in the 10.6-10.7s in a 3000 lb car. I built it to be a low maintenance, lower rpm build and not twist the guts out of it so it'll live a long time. It all really comes down to how hard you want to twist the engine. No sense in building a engine that peaks at 7-8K if your only going to run it to 6K.