This is what I would do! :smileup:If you are looking for more hp but don't want to get rid of the truck or buy another, swap a 4.7 in. They are the same family. But it's your engine.
Longer rods won't change the stroke, it will just change the location of the piston within the bore.This is what I would do! :smileup:
Talk to your friends a little more, they should know that there is a lot more to stroking a motor than adding longer rods.
You are pushing the piston further up into the quench area and you will need pistons that have valve reliefs so you don't have piston/valve contact. There are a lot of measurments to be taken before throwing in longer rods.
Your 98 had a 3.9, different animal altogether (although it was derived the same way, they took 2 cylinders out of a 318).I have the Liberty with the 3.7 and it has been a rock solid engine. Lots of torque for what it is. This engine responds very well to intake and exhaust mods. a decent CAI and better flowing exhaust give it another 30 ponies or so. It's very noticeable. Rebuild it stout and boost it, or find you a low mileage v-8 from a salvage yard to throw in it, Get creative.If you have engine guru's to help you, bump up the compression and go with some larger valves and stiffer valve springs for some more fun factor. I also had a 98 model Ram 1500 with what I believe was the 3,7... It was no speed demon, but like the Liberty it had bookoo torq. They like 5w-30 full syn. oil too. I picked up a few more mpg's running Mobil one syn in her at 5k intervals. The Liberty has 95K on the O.D. and still does not use a drop of oil. Wifey drives it, except for now she has fell in love with my Express and steals it quite often. Not cool, might have to kick her to the curb! Anyways good luck with whatever you decide. Just throwing some ideas at ya'.
That explains why it was such a good engine. I pulled a car that was buried to the frame in sand out easily with no throttle..Just eased the clutch out in 1st and out she went. I miss that truck but it was embarassing having to wave off people wanting to race me. It was a red 2wd & had the chrome wheels and trim plus a mopar sport fiberglass hood. Looked mean anyways. Cops watched it like buzzards on road kill.Your 98 had a 3.9, different animal altogether (although it was derived the same way, they took 2 cylinders out of a 318).