I am after an inlet manifold for my 4age to mount 2 x DHLA carbs. I have swapped by head from a small port to a big port and the of course the original does not fit!! Anyone got one or know where I can buy one? I am supposed to be using the car at Silverstone on Wednesday and don't really want to put the old one back on!!

smallport inletmanifold fits the bigport head no problem, not 100% optimal, but it fits and works.

But why on earth would you replace a smallport head with a bigport. Tuningwise the advantage of the bigpotr starts when you go silly on cams and have a really expensive bottom end.

Also the bigport doesn't have the extra oil drain from the head to block.

Sorry, there is no way the inlet manifold I have will fit the big port head, although the head I have bought has been gas flowed and had a special valve job, so not sure if the makes any difference. I am running Toda 272 degree cams. I did notice there was a different drain configuration, but not sure if this was not a breather from the crank. Regardless, I am still after a manifold!!