Curious

cuda620 said
Looking for a recipe to build a big block that will eat an LS camaro for lunch Without the big block being unstreetable or unreliable. Going in a a body. Options open as I've not started the build. Btw, you never see posts or videos of mopar so vs LS cars....?

Your first requirements. I gave you a cheap, low compression solution to the existing requirements.

cuda620 said
So my only solution is buy an LS camaro ooorrr,put an LS in my old mopar.??? Gotta be another way to have something that fast, but cool too. Almost went 440 or 451 but son in law has a very fast LS camaro swap with a 6speed. Stupid fast with only cam, heads, and long tubes. I helped him build it. He also gets mpg in the low20's. It's a nice car but I like my mopar.... Gotta be a way???.....

Now you have added a mpg requirement. But I haven't redesigned it for you have I?

cuda620 said
Saw my son in law beat 2 440 mopar with a little LS1. An
LS3 is bigger and stronger. I like my 440's. Been thinking a 451 would rev quick and may do it. Shame Chrysler missed the boat on the tech.

Obviously these 440 owners had engines in cars with power to weight ratios that stunk up the road. Who's fault is that? Betcha no one answering this thread.

cuda620 said
LS1 swap is running 11:20's no tuning yet. And mileage in te 20's. How can
I build a mopar to do it? If it cannot be done,say so. But gotta be a way...

It can be done. Figure it out. Oh, that's right, you want it given to you.

cuda620 said
Been doing my research. You are right. Tryin to relive a 30 year old dream when the Big Mopar was a force to be reckoned with. I built a 68 cuda with a 440 and nos. Big dog back then... No more. I had several big and small block molars.Hate to use the term, back in the day.l may build a LS3 and put it in my A body. Least then I can drive it and be competitive. Love the car but the mopar or no car stuffs a joke. Never liked camaros.Never had the cash for a hellcat....lol.

My son's 2011 R/T Challenger (4,050 lbs and a 5.7) has 621 FWHP and gets 26 mpg cruising. Some of the technology could be applied to a 451 or 440 and get within the range of your (modified from the original post) objectives.

Aero, chassis, compression ratio, cylinder head, piston, camshaft, intake, FI and even carburetor technology has reached the point today where it could be done in an ABody.