I am fitting the bonnet and i am cutting around the exhaust manifold.

what sort of gap do i need between the fibreglass and the manifold?????

Ditch

Not alot, there's some pics in my archive showing the exhaust hole for my blade engine.

I would put some kind of metal surround around the hole though or wrap the headers as they get VERY hot and may discolour the fibreglass..

HTH,
Rich.

We used 10mm all round - it does get VERY hot - so possibly I'd go more. Us a shroud of some type in Stainless or Ally to sink the heat.

How is the metal surround viewed by the SVA inspector?

Ditch