So here we start....150$ 318 LA short block

Yes...but suggest me one , ahahahah im on a very limited budget , so i want , power , high rpms and reliability , not spending too much $$$$

Ah, yes we are in the same boat. However, the engine is not something you want to build "cheaply". you can build one for cheap per say; re using the old rods but with really good ARP bolts, porting the old iron heads instead of buying aluminum ones, stuff like that. I am already saving for a "cheap" build up on a 440 and I am planning on saving up at least $2300 just because if i do it cheaply, and skimp on the important things, the money I saved on cutting corners will just go into another engine 4 month later. Build it right, and build it once.