Here is another option (see link) for using your existing tube axle with 2" long kingpin boss. These new "Stiletto Spindles" are for a 2" boss and cost less than the Strange. Plus watch out for the Strange spindles that are adjustable height, I think they are 3" length. You do not want the adjustable Strange spindles for your dragster front axle.
https://secure.chassisshop.com/partlist/19813/If you prefer to use your stock Anglia spindles, the Chassis Shop sells new Pro Werks axles that have 1.875 inch bosses. Refer to the advertisement with "SPE Axle" in the headings. And before you purchase, contact the Chassis Shop Company to verify your stock Anglia spindles with work with their new SPE axle. Here's the link:
https://secure.chassisshop.com/partlist/15365/These Pro Werk axles are all 8 degrees. I know you are wanting to build a 60s style dragster. The front tire cross-section for a 60s style dragster is different than a front tire for a modern dragster. Are you familiar with an Avon Speedmaster tire used prolifically on front engine dragsters in the 60s? Their contact patch (more rounded) is different than a modern dragster front tire which has a very flat contact patch with the road surface. Use a new front tire similar to an Avon Speedmaster cross-section and your question of 7.5 or 8 degrees inclination related to camber will not be a factor for your dragster build. Original 10 degree Anglia spindles, I'm not aware of but it's possible.
If it were my decision, I'd prefer using the stock Anglia spindles, they fit the 60s fed theme better.