Hi Richard, you're spot-on, sir, the print out I have says it's reprinted from the '54 original. If I could work out how I'd send you a copy, but the site address I found is http://www.californiabills.com/books/chevyspeed.php if it's of any interest to anyone.
I wondered whether, as you said, the procedures dating from back then, they might be 'home-shop friendly', if you know what I mean.
i've got some useful old plant tucked away for when i find myself somewhere to set it up, lathe, miller, grinders, gear of a vintage that doesn't make it attractive to the newer generation, but will still do the work if asked.
I figured that heads and pistons 'n cams seem to still be kicking around over your side of the pond at affordable prices, so I'd thougts that older techniques, proven through use, might be the way to go.
But hey, I know nothing, this is my first flat-head, and the first eight i'll have tried breathing on. Most of my past experience has been on standard engines or small stuff, and over here, as I'm sure you know, people think of a three litre as a big lump.

All and any suggestions/advice, pro or con I'll receive gratefully.
I spoke to a guy some years back who was fitting turbos onto his 'bikes and getting them by his insurers, so please, feel free to pursue the thought; only a fool asks for advice and then doesn't listen... i'm listening
cheers, Len