Who knows of places around brisbane, who do good strong engine rebuilds??? for an A12 and A15 motor??? and how much??/

Can't speak for a series engines but I have had a few Gemini engines rebuilt thru Mendam engineering at Rocklea. The last block I had done was cleaned.bored to 1mm oversize,block decked,crank linished and new main/big end/rings supplied. Cost about $300. There is a place in Bullockhead St at Sumner Park that does my cylinder heads. Think its called Liddle's engineering. They have done several of my heads and rebuilt both my Sportster iron engine shovel heads with stainless valves. Top work and they into racing as well.