Hi guys, I posted this at the end of the last thread, but it is a couple of pages back, so I have reposted.

Hi Phil and Rhys,

Thanks for the very informative info. Just to throw a few more thoughts... Somewhere in the parts bin I have 2 Dellorto DHLA 48s on a short (about 4"?) manifold. They are from an old race car that I bought and running big venturis (44mm, I think), but at least there is a base for feeding more fuel. I've also got a "race head" from yet another parts bin. I've never tried the head,but it looks like it is pretty smooth, 44mm valves and shaved guides. I was told it was a good head, but who knows until you try. I'll take it to the bloke who will rebuild the engine and get his view before getting excited about it.

So my conclusion seems to be (from all your great info, and please correct me if I'm wrong)... stick with a carefully cleaned up B head unless the 'race' head looks brilliant, get the lot balanced and blueprinted, compression ratio between 10 and 11 (deck the block vs plane the head?), lighten the flywheel (how much is sensible?), steel timing gears, FI manifold and the 2 1/4" exhaust, regraph the distributor if necessary, new lifters with hollow pushrods (are these necessary?). Webers or the Dellortos, and the starting point should probably be a D cam, but I've emailed KGTrimning and Unitek for their advice on more modern cams - this seems to be the main outstanding in my view.

Thanks again for all the help.

JohnH