I had a forged 402 dropped in my Vette and she is putting down 505 torque to the ground. More than enough power to pass while towing a boat. Look into crate engines and have one drop shipped to an installer of your choice. Depending on set up, labor for removal of old engine, install of new engine and tune may run $3500+ just for labor alone. Figure $4000+ for a new long block. But, it may just do the trick. I went with the SLP short block and built that up with AFR 225 heads, big cam, full exhaust. Granted my baby isn't meant for towing, but sure does surge your adrenaline passing a 2008 M6 at 190 mph.