danbob that's what i really wanta see some numbers. what weight is your roadster? are good core blocks easy to come by over there? a good 440 block over here in oz are just to much money. a good block that's had all the checks & machining add good main caps added ect & where on the way to a indy or kb block. factor in weight saving & rusty 40 year old jackets + strength & bore size. a big dollar block sounds like a good option. it'll just take me 5 years to get one. hey guys keep the NA specs comming please.