I should have done some Barwell searching before pointing you to the Mk1 Performance site, in fact they did have a page on Barwell.  That might have got you off to a better start.

//mk1-performance-conversions.co.uk/barwell.htm

I'll admit my post was less-than-friendly but I'll let it stand. I was responding to the "Didn't get much response, got banned, got blacklisted not sure why..."

I was explaining a possible reason why.

I too got the private email first and then saw this posting. The unsolicited email set a tone which followed me to the tone of this posting and 'helped' me when I was formulating my response.

well.. if you want to test out the high  end price.. put it on ebay in japan.  later bc

I'll jump in on this one...
Like several of you, I am aware of the Barwell heads, but had never seen reference to a large bore unit.  Interesting, unusual.  Useful?  That's anybody's guess.
One way to determine an item's value at a given point in time is to post it on eBay and let the auction run its course.  When the auction is over, that is the value to someone at that point in time.  The item certainly could be worth more or less to other people at other times...
I'm willing to give it a shot and offer $250.
Tom

I'd never heard of it either.  But doubt it's a small bore, combustion chamber spacing all wrong, but very weird valve location!  Exhaust valves moved way in as though to clear small bore blocks, but chambers located for 1275 block! Interesting history but not much performance potential.  Put it on display on living room engine!

red riley.. I totally agree about your last post about Spank. fyi I had NEVER heard of these alloy heads..  thanks 1967mini cooper for the post and welcome to the ZOO at MM. Always  nice to learn something new about classic minis or mokes... later bc

Jeezus. You all are being awfully prickly toward someone who seems to have just found something and wants to know what it is and what it might be worth. Like he's going to find out anything about an aftermarket aluminum head on Antiques Roadshow! It didn't sound to me like he was trying to get something for nothing or make a quick buck. Just trying to see if anybody has any info.
Somebody wizz in your cheerios this morning?

Not everyone takes kindly to strangers or near-newbies posting things like "How much can I get one of you to pay me for this part I have" or "Can someone offer me valuable information for free to help me get a bunch of money for something that I otherwise have no idea what it's worth, but if it's valuable I want to know so I can get a bunch of money for it" or other not-so-subtle marketing techniques...

I think there are already platforms for valuing what you have

//www.pbs.org/wgbh/roadshow/
https://www.history.com/shows/pawn-stars
//www.crawforddirect.com/worth.html

www.ebay.com

Didn't get much info on the head.Tried to post on UK forum,and got banned.Wiil post some more pics and then try to figure out what i'll do next with the head.It seems like what happened over the pond,i must be blacklisted and no one wants to reply

You, it seems figured a way to send a PM to everyone on the MK1 board. It would seem that upset the webmaster there. If you had opened a thread about the cyl. head only those with some info would have replied. I'm sorry I did not explain to you how to use the MK1 board. I tried to smooth that over and got fussed at as well. I'll shoot you an email. Steve (CTR)

Posting new pics of the head.Didnt get much response from the mini forum.Had a bad experience with the British MK1 forum,got banded for I don't know why.Just trying to get some info on this part so I can make a decision on what I want to do with this part.

Hi 1960's. Barwell sold 850, 998 and Cooper S tuning equipment, including modified heads, cams and big carbs.

Their most interesting product was an alloy cylinder head. Known for good design and is both well made and of quality construction. For a small bore motor, but as with most of these early alloy heads the valve spacing prevents its easy modification for use on a big bore engine.

Will be of interest to collectors - unlikely to be put back on an engine.

Do you want to sell or keep it?

Thanks, David

Gotcha, searching for info.  I would suggest searching for info at MK1 Performance Conversions //mk1-performance-conversions.co.uk/mk1_index.htm, also has a forum where experts(?) do respond.

Couldn't find much on the web about this head,was looking for some more info from fellow mini owners.There was a block with the crank in it,also remote tran and the clutch.Just trying to fiquring what I have here.Is this something rare? Don't really need this in my mini,could sell.

An aluminum head might be an awesome thing but as someone who knows nothing about Barwell, and only a little about V.W. Derrington,  the post puzzles me, seems like you left out the punch line.  My apologies but not sure what is the intention of the post ?  Are you just sharing some old pictures, or is this a search for info, or are you asking for opinions on its value or performance potential, or is this a possession you are trying to sell, are you looking for parts to make it complete...please let us know where this is going.

Came across a Derrington Barwell Alum head.Part #722149 looks like cast #2a609.Looks like 11 stud head.Dont know anything about it.Will try to post pics,if cant look up my profile.