I jus took my datto to the mechanics to get the engine checked over and its got 2 f@cked pistins, blown head gasket which is letting both those pistins run into each other. A blown inlet exaust manifold gasket in pretty much every place it could be blown, letting exaust and too much air run through the engine. Im running, well kinda running, a 1200 block with a 1500 head and twin 40's. Jus wondering if anyone can tell me if its worth upgrading to a a15 or jus rebuild the engine i got?