my new neighbor happens to be a big mustang guy like myself. when i moved in my house i walked over to his house to talk to him. hes got 4 mustangs in his driveway. a 70 mach1, 66 2+2, 84 gt and a 87-93 fox 4 banger dd. he happened to have a spare 5.0 block and ive had a 70 351c 4bbl for a few years and havent been able to even give it away. anyhow his mach has a cleveland in it and we are trading engines, so now i have a stock bore 5.0 block. im thinking of building a 331 out of it but not sure. i may put the juice to it but not sure. definatly all forged internals. not sure on the heads. what ya think, any suggestions, advice would be fantastic.