hey there you might want to use both the side mounts from the later / your engine and also source a front cover from an earlier 12a or 13b with the front mounting points the are all similar aqnd all the oil pump assembly will fit, major diff is the water pump u will have to use an older pump , this is the process we have used on the new engines in the old cars r1oo rx2+3 etc the engine in the pic (that u have seen before ) has a plate from the front to the centre plate with the bearing carrier to help stop the flex at the crank/eccentic shatf at this piont
i would love to see this rocket in action