I picked up an intake manifold for a pair of Delortos for my A12(a). I just noticed that the port side is sized for an oval port head.
My questions are:
1) Can I open up my stock A12a round port head to match the oval manifold ?
2) Can I open up a stock A14 round port head I have to match the oval manifold ?
3) Do I need to find a Oval Port Head
4) If yes to #3, in the US what year and model head do I look for, A14/A15?
4) Do I have any other options, besides getting rid of the manifold.

Thanks for you help.
dog

No
No
No.
You can use the big-port manifold on the small-port head. Yes, it's not optimum, but it will work.

The best solution would be to put the A14/A15 cylinder head on your A12A, so that you get big ports all around.

dog....

what you need to look for is the H72 on the head.. take the valve cover off ( ok duh ) and look for the markings.. then you can port you new head to match your intake. there is enough room to do the porting, we do it all the time ! if you cant find a head let me know and I must have 6 or 7 of them ..

switzergt5@yahoo.com

john

well I have an A12 one and need a oval port one, how about a swap, all it will cost is freight. Feasible, I don't know but.

Both of the heads I have the one on the A12a and the one I picked up on E-Bay (sold as an A14 head) don't have serial numbers. They do have numbers cast into them the A12a has 728 and 406, the A14 has 990 and 409.
Peter Z from Mo, said that the A14 should be able to be machined to match the manifold, I just have to do some work on the oiling from the A12a block. I guess you are saying the same that the A14 round port should be machinable. I'm going to pull the head off of the a12a this weekend so I can comapair the undersides of the heads to see if the one head is different and if the A14 is in fact an A14 one. I'd like to use itsince it seems to be a "New" head.

Where are you located in case I need an Oval port A14?

thanks,
Dog

Sorry, I was refering to the manifold not the head. ( I knew what I was thinking )

No problem, I was responding to JSwitzergt he seemed to have oval port heads.

I would consider a trade, but I'm putting my A12a into a Locost 7a replica (Lotus 7) which I believe on your side of the world you call a clubman. The manifold I have won't fit into a 1200 or a B210/210 because it is a little too long. I don't have a space problem while I've been told you guys with Datsun's would.

Dog

An A12 in a lotus 7, most people in NZ install a 4AGE from what I've seen, would be good to hear how it goes anyhow.

I wanted to make a real replica and was going to use a MG Midget 1275cc engine, but I got a good deal on an factory rebuilt A12a (1237cc). Im using a 1980 Toyota Corolla station wagon rear end, and like the original Lotus 7 a triumph front uprights(spitfire)

I'm looking for light and if I can get a good 100hp at a vehicle weight of 1000 lbs I'll be very happy. Most people over here are using the Toyota twin cam too, but Championmotor cars here in the states has made a Locost chassie to take Miata parts.
engine, a-arms, rear end..

dog

So my options are?
1) get a GX head
2) Can I machine my A12a/A14 round port head a little to so that there is a smooth transition from the oval port manifold to the round port instead of a brick wall with a round port at the bottom?
3) swap/purchase my oval port manifold for a round port one?
4) I'm open to other options?
Dog