1965 barracuda advise wanted

I just purchased this 1965 barracuda and it was just restored and is completly numbers matching..... The advise I need is I bought this car with the intension to install a newer hemi engine in it., well everyone that has seen this cartels me to leave it alone and not to alter it......I r,Wally do nt want to change anything except the engine I will Ty to post a few pics please let me know your thoughts..Thanks