Looking for a set of type 4 square port heat exchangers to bastardise, cannibalise and chop into pieces to make an exhaust pattern before venturing out with shiny metal

Rougher the better - just as long as the section that bolts to the cylinder head is ok

You on about the 2ltr type that sit flat on a pressed metal gasket. Will check my shed tomorrow but I think all mine are oval port that use the copper gasket

You described what I am after perfectly   

Had a look for you mate, sorry ....ya lucked out, all mine are oval port mate. I must have give the other ones away at some point.

No Worries - thanks for looking