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Most B body guys see there rides as heavy pigs that NEED a big block and there is none better than a 440 being it is the biggest.
While a B body can get a bit fat, I see a lot of the B body crowd cry and whine over there cars weight @ 3600 (+or-) as if the world is beating them up.
I run a stock 5.9 long block backed by a 727 & 3.55’s on 26-1/2 tires in my ‘79 B body Magnum with no complaints to it’s performance at all. The cars weight as listed on the reggie is 3675 lbs. Adding a 440 & a 727 adds a significant amount of weight, the performance potential is obviously much greater, but is it needed for a cruiser? They think so. I disagree.
By way of aluminum intake and headers, getting ride of what is not needed, A/C and a lot of wiring to the tune of approximately 10 lbs., the car just gets lighter and lighter.
For a pure driver, a stock 318 would be fine and one with some bolt on parts and a cam would be just great.