Gas engine will not be a problem if towing a R27. Would diesel be better ? Yes. I tried towing my C26 with a light duty vehicle. 5.7L , class VI hitch with weight distribution bars ( 10,000 lb max 1200lbs tongue) 3.43 rear end Load range c tires. Would it pull the boat? Yes. Was it sufficient for a tow vehicle to pull the boat out of the water or launch ? Yes. Did it tow on the highway ok. Yes, in short distances it was fine. The issue with the light duty trucks is they are maxed out when trying to use them for large loads. There is a HUGE difference in the build of a 1/2 ton truck when compared to a 3/4 ton truck. A 3/4 ton truck is the start of the heavy duty trucks. Frame size, suspension size, brake rotor size, brake pad size, radiator size, transmission size, rear end and axel size, tire load range, hitch size, ( Chevrolet HD have classV hitches included in tow package. I sold my light duty vehicle and purchased a HD2500 4x4 long bed,6.0L Gas 4.10 rear end, tow rating 14600lbs without weight distribution bars. We towed the C26 over 20000 miles comfortably. The 6L gas engine had plenty of power to pull the C26. The C26 is comparable in weight to the R27 ( I scaled the truck, trailer and boat 17500 +/-) truck spec weight is 6400 dry weight. C26 + trailer loaded to travel estimate 10600 lbs + extra gear in truck bed 500lbs = the scale weight 17500. My opinion, as much as I wanted to have a light duty truck to tow my C26 I was not comfortable doing that. The best way to make a decision is go to a dealer Ford or Chevrolet. Have the salesman pull a 1/2 ton light duty up next to a 3/4 ton Hd. Both vehicles equipped option wise the same. Both with gas engines. Look at brake size,tire load range size, frame size, hitch size and compare specifications. I did this and after doing it I could easily see why the same truck in the half ton version weighed 2200 lbs less. It was light duty and even though it was rated to tow 11000 Lbs with all the *** full filled it was marginal at best to tow the Cutwater C26. The Hd had no *** to tow 14600 on the hitch. Ethan do your home work. I’m sure you will figure out what vehicle to tow your new Ranger with. Just throwing out my opinion.