Quote:
Originally Posted by Awann99
I feel like it would be pointless to go through the work of putting a LS in the truck without a modern transmission. I could swap in a 700r4 and put a stand-alone fuel injection kit on the 350 to gain a few MPG but the cost for that would be almost as much a full ls swap. I will be commuting for the next two years minimum so I want the gas milage most.
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There are scenarios where LS with th350 makes sense. Like if you don’t have the budget for a modern trans, you don’t need to modify your driveshaft saving some more $.
Also depending on the rear gears used you could end up with similar highway mileage. 2000rpm at 65mph is going to net a certain mpg, doesn’t matter what trans and rear gear combo you use to get there.