The Plymouth Weslake DOHC Motor from the 60's

gregcon said
I considered an R5P7 but found it wasn't the way to go... very limited parts, no room for added cubes, etc. They're space age engines in many ways but also leave something to be desired in other ways

I saw a crazy setup at Carlise this year. R5P7 with a big turbo setup. If I could have found a complete motor for what the owner said he paid, that's what would be in my car now.