[wilf leek]

Guys - thanks, and yes Jack21, my friend is amply supplied with tools - he's the guy who built my car!!!
Now he is building (another) one for himself, and using a FE engine for it. Whilst there last weekend I looked at the heads, and idly remarked that I thought I had seen someone talking about CJ heads and removing these humps in the exhaust ports, just couldn't turn it up in a search, since just searching on "CJ" can't be done (must be 3 letters or more long for a search term), and using "heads" as a search term got me drowned in results!