Hi im different ,Stick to the u67 head it is much better.
You will need to weld up the combustion chamber but the ports will come out safely to 40mm.Other heads are too small in the ports .
Try to get a gas head ,small chambers larger ports.
Dennis

thanks for that.
will be going to flat top piston to raise the compression

the gas head is the aspen head?
aspen 200bs are the gas ones right

feral agrees with the usefulness of 200B factory gas heads. I think the aspen was just an 'accessory pack' version to lift sales near end of model a la Falcon classic etc. dedicated factory gas were just daggy old 200 b I'm sure. Check with errol at Datrats - he is a guru of such things.
Cheers

Quote:No. The "Aspen GL" [to give it its actual model name] was just a tart up of the regular GL model. It came with special paint, chromed headlight surrounds, mag wheels [which were also optional on the 200B GX] & the Aspen GL decals both outside & on the glove box lid.

The LPG model was just that, the 200B GL-LPG
The LPG head can safely be used with lead free fuel in dead stock trim, while the regular heads will need to be modified. The part number for the rocker arms for these is different too & from memory, there were regarded as being the ones to have, but I forget why.

do aspens come with factory gas?
just seen alot of aspens on gas

Possably a factory option of the era - oil crisis scare - fuel prices ouy of control ......... funny how history repeats
Cheers

I have seen only about five or six LPG 200B's & none were Aspen GL's.