Blydenstein Head/ Valve identification

[wwinstanley]

I got hold of a head, which was in a job lot of spares i got hold of. The previous owner told me it was a blydenstein, there is blydenstein paperwork there but that could relate to any head.
Is there an easy way to identify, i cant see any numbers on it which may suggest it is.
I have removed the valves and the GM numbers on them are as follows:
Intake: GM T-T 29199/1
Exhaust: GM T-T 29200

If these are standard valves then the possibility is that it is either a standard head or one thats just been polished/ported and not big valved.
does anyone know what size valves were in the BB heads?

Any help will be much appreciated, obviously if it is a decent head i will rebuild it and put it on my sport!

[dgbnova#1]

http://www.migweb.co.uk/forums/items...ad-others.html

valve sizes mentioned here

[wwinstanley]

A one-off Bill Blydenstein B+ 1.2 head. 35mm inlets valves, 31mm exhaust

Just measured my valves and they are 35mm and 31mm respectively. This must mean that the head i have is a B+

[dgbnova#1]

Going off that info yes I know standard 1.4 is 29/32 mm.

[therealnovaboy]

Blydenstein are waisted stem on b+ heads. I don't think any gm valve are wasted stem.

[wwinstanley]

Ok yeh these valves are not waisted stem. So could this mean the head is a B and not a B+?
Does anybody know the specs of the different BB heads? Im guessing maybe this is a B which would be polished ported and larger valves??

[therealnovaboy]

Ok yeh these valves are not waisted stem. So could this mean the head is a B and not a B+?
Does anybody know the specs of the different BB heads? Im guessing maybe this is a B which would be polished ported and larger valves??

Think the A's are flowed heads B's are flowed + bigger inlet valve and B+'s are flowed + bigger inlet and exhaust.

If you put pictures up I might be able to suggest if it's a BB or not.

[mowgli]

i thought they fitted valves from the big block 8v engines...

[therealnovaboy]

i thought they fitted valves from the big block 8v engines...

They maybe are but non oem waisted stem valves

[andybishop]

When Bill did my 16v head many years ago he stamped Initials and an identifying number on the distributor side of the head.