Corey dont forget most A15 are old and worn so 78mm bores will change that quickly and not to mention if you are interested there is a Mazda mx5 head that is actually very easy to fit once you have the front plate and headgasket. The pioneer of this conversion will be offering the front plate and headgasket while the rest just falls into place once those parts are sorted. Just something else to consider in case you are chasing more ponies and better optioned head. If you use 78mm Mazda b6 pistons you are set for the Mazda head in the future as its quite a cheap setup to do compared to working an A head.

A15 or a14 and a 32/36 weber was better imho than su carbs. Get elec dizzy and a cam and you will be happier than an a12

Thanks again for everyone's ideas and input about which direction to go with my lil ute. As clyons8 said a few back it's all about the bank building up to start the mods... I am defiantly going to chase down the a15 option and build it to a running point and bolt it in, thanks D I'll keep an eye on mx5 head swap on here but I'd like to keep it original looking without the cross flow head. I'll be happy with what ever I can get out of the 15 with a cam carby exhaust and the elect dizzy... I hope! But at the end of the day I bought the 1200 because it is a 1200 I don't mind going slow ( sometimes) and just love the look of them. If I can work out how to add more than one pic to a post I'll throw a few picks up of my ute on here so u guys can see her...
Many thanks again guys

Well said and good choice! Some of the guys also fit English SUs and I actually prefer the way they look and that they are available in all sizes with excellent aftermarket support.