I went down to a guy I know who keeps a bunch of old mustangs layin around for parts. I pulled a motor up out of a 73 mach I and thought I just got a plane jane 302. Well for 200 bucks it ought be alright. Make a long story short I pull the heads off and tear apart the motor. I aint rich so I dont go to a machine shop to clean my blocks and heads I clean them the backyard way. A few cases of Gunk and oven cleaner I had the heads back to cast Iron. My buddie and I were both stumped on the valve springs color. We both knew that stock heads for that year were like a blue ish color. Mines were oarnge and purple so we knew then it wasnt a cobra jet or a stock motor. We though maybe a HO. I decoded the casting numbers and wound up with a junkyard jewel a 302 with interceptor heads. After gunkin and pressure washing the block I got the codes off it and found I had the whole interceptor motor. Suprisingly after well over 30 years it still had the original main bearings and crank in it. The only mods to the block were a performer cam and lifters. Im writing to see if anyone knows of the compression ratio, bore stroke and etc on this motor. I know the heads have larger intake and exhaust ports but not sure about the rest of the block. Im also wanderin if anyone knows the orig hp and torque specs of this motor. By havin a rough idea than I can begin to estimate my hp after I port match install my aluminum 4bl intake, beefy cam and lifters, polished crank etc. Thanks