i have an 86 mustang i bought last year, thinking everything was original. yesterday i decided to tear the engine apart to rebuild and prepare for a carb swap. when i took the heads off, i noticed the pistons arent the "true flat top" pistons they say the 86 mustang uses, so i flipped the heads over and found an e7te casting. the setup is speed desity so i assume its most likely an 87 or 88 block, where can i find the casting on such years? also, if i intend on keeping the engine stock, or maybe just a mild cam, what carb would be best for street use that will give me the power when i want it? i assume i shouldnt get a double pumper as the engine will be stock, i was thinking a 600 edelbrock with vacuum secondaries? im open to suggestions!