I bought a blown up Bmw e12 to s52 swap

About BMW E12

The BMW E12 is the first generation of 5 Series executive cars, which was produced from 1972 to 1981 and replaced the saloon models of the BMW New Class range. Initial models were powered by inline-four engines, using either a carburettor or fuel-injection. A year after launch, the first model powered by a straight-six engine was introduced. By the final years of E12 production, most models used a straight-six engine. There was no M5 model for the E12, however the E12 M535i is considered to be t...