Its better than stock V-8's in its cubic inch range. It will last longer than most stock V-8's in its cubic inch range. Its got more torque at lower rpms than stock v-8's in its cubic inch range, which is what you want in a truck. I'd rather have all my torque at 2000 rpms than at 4000 rpms. I'd take a 300 over a 302 or a 4.6l. I dont wanna rev to 4000 to get any torque. As for the best motor ever made, thats an opinion. There is no best motor ever made.

jeep 4.0's have 181 h.p. @ 4600 RPM & 222 ft. lbs. @ 2800 RPM. no *****. The 4.2 beats that thing. I remember when i hooked chains to a wrangler with one and drug it with ease. better mileage? no, if they do barely. good numbers for a I6-mildly, reliability-i dont know, but my I6 has 166k on it and the motors never had a problem. The 300 outlasting the body of the truck it's in says something about reliability.