If you want to stick to the A series, A14 or A15, have a talk to BigE, His business is building A series engines for Speedway, but has also built street motors for members. Try sending a PM or call ATE engines on 0412864741 or email ateracing@hotmail.com. You can also try Stewart Wilkins at SWR Rallying on 02-4577-2400 or www.swmotorsport.com.au, or Jeff Taylor at JTS.
If you want to try an L series or a CA18, again call SWR. They have a large workshop near Windsor & Stewart's been rallying cars for a couple of decades.

I'm thinking upgrading my brakes and steering before I place in a new engine, just trying to think smart about how to go about this car, cheers b310gx for those contacts.

definitely echo comments about doing the brakes and suspension first then the motor. Make it safe, then fast, so to speak. And doing the mods/upgrades to the suspension will help you get an appreciation for both the potential, and the limitations, of the car.

An interesting thing - if you start driving it with the stock motor and upgraded handling, you'll get a great opportunity to really fine tune your driving. When you haven't got bulk power to 'cover up' shortcomings in driving style, you have to learn corner exit and entry, braking application (smoothness in general) and turn in. All these things can only get better (and there isn't a single person here who couldn't get just a little better than they currently are, so I don't mean it as if 'you' yourself need more skill or something, I don't mean it like that at all!) then when you get to a motor with more grunt, you'll have a much better foundation to truly make the most of it.