7R engine

[Semper T]

Looking for some information on engine I purchased yesterday. I cannot find a serial number presently. The case # is 901 101 101 7R &102R. I believe it is all magnesium. It has a bosch dizzy # 0231 184 001 JFUD6 with a 6500 rpm rotor(? 72-73?, Oil cooler Behr BO 911 107 041 00 (some previous threads I've checked say this is stock for 72-89. The heads are numbered 901 105 111 1R. Non-magnetic cylinders and the intake openings measure about 32 mm. The fan shroud that came with it was bright green (like rsr) and painted black. I am not sure what I have here, but it came with zeniths and didn't set me back many $. Any ideas of where a serial number might be found (other than the typical location of the right side of the alternator support casting) ? Any help would be appreciated Thanks.

[J P Stein]

To the best of my knowledge the only 2.7L that came with 32mm ports is the 911/91 made in 74 only (God knows why). 150 hp with CIS & 8:1 compression.
If there is no S/N chances are good that it is a replacement case (I had a 2.4L like that at one time) Look below & to the right on top of the case (bout 3-4 inches)of where the s/n should be for the type number....that will also be missing if it is a replacement.