Went great because you have a 2v intake on 2v heads. While there are some differences in 2v vs 4v blocks on some of the high performance blocks, the bore and stroke is the same. There were 4 bolt mains on some 4v's but not all. There were some wtih peened rods and stronger bolts but not all. There were some with nodular iron cranks but not all. And of course there were some 4v's that had different cams with mechanical lifters ...but it would be unlikely that you would have a Boss engine that someone would only take out the top end and leave a racing block in the car and put 2v heads on it. The 2v is a very strong engine that produces great power when slightly modified (like your edelbrock 2750 alum intake) and produces that power at a lower rpm. I believe that stock torque ratings were very close between 2v's and 4v's and the 4v hp ratings were advertised at rpm's more than 500rpm higher than where the 2v peaked. I believe a 2v with 2:75 gears would be preferable to a 3:75 4v for any trip on the highway for more than 50 miles, and for a street car with an automatic the 2v with better intake and carb, plus a dual exhaust will perform just as well as the 4v's do in original factory form. The Boss 351 is a different story of course. By 72 the 4v's higher rpm needs made the engine much less attractive than he specs on the 71's. and anything that is a Cleveland is better than anyhing that is a windsor.
Your vin will tell you what the car had originally.