Yes, all three manufactures are producing base motor trucks getting real world 19-22 mixed MPG depending on the driver.
I have read reports of Pentastar Ram and 3.7 F150 owners knocking down 23-34 mpg highway. I've not read too many reports on the 4.3 yet.
I'm not a brand of truck guy, I've owned Rams and Ford trucks, Several Chevy cars and am confident that all three makes a decent product.
The Pentastar is attractive to me more out of all three motors because of design advancement.
Things like the heads have integrated exhaust manifolds and my experience with my heavy Pentastar Van consistently getting 22-23 mpg in mixed driving and 28 mpg highway (yea surprised me too).
Overall, I'm leaning Pentastar Ram but that's based on just research, I will know more when I am looking out over the hood with the pedal mashed to the floor.
I scoped a crew cab Pentastar Ram online at the dealership I bought my wife's Van at. It has the 3.55 gears, 7200 lb towing capacity , and nearly 1800 lbs of payload. This truck would tow a lightweight TT Just fine. (thinking Apex 288BHS coming in at 4842 lbs dry)
I would not hesitate to use the 3.7 F150 or the 3.6 Pentastar or the 4.3 EcoTec GM to pull a trailer like this. They all three have WAY more HP than my old 5.4 97 F150.
The VVT in the EcoTec is still a question mark in my mind. One camshaft and VVT....I'm in wait and see mode. However, I have not read any reports of issues with the single cam VVT.
Thanks!
Jeremiah