They were only in production for 2 yrs. until Packards demise. With 5" bore spacing, they had their sights on going way over 400 cu.in. to compete with Cadillac. The intakes flowed well but they went with the same exhaust port layout as Caddy, Studebaker and AMC, having the siamesed center one, a flow limiting factor. A terrible oil pump led to a ton of recalls for burned up bearings, the clock ran out on fixing their issues and it's just history now.
If a company has deep enough pockets, they can get by stuff like that, remember the Ford flathead V8 had a lot of reliability problems in it's first year or so but they stuck with it and it went on till the early 50's.
Yep, you can turn just about any lump into a hotrod engine if you throw enough money at it, but common sense and a skinny wallet usually puts the brakes on that - usually