Help!Is the stock EFI enough, 74 EFI ?'s Options

[Gunn1]

I Recently purchased a 74 914 (VIN 4742901009) with what I believe originally had a 2.0 liter installed in it (original engine ID 006765). According to the seller the stock engine had one of the cases busted when it had thrown a rod through it. He went on to say he purchased a case (W0111578 ID found in front of oil filler) and took the remaining parts from the original engine to a shop here in MPLS. there they replaced the main, rod and cam bearings. Blasted-polished the crank and rods. installed a 30mm high flow oil pump. Honed the cylinders & installed and gapped new 94mm ring set. Replaced worn camshaft with a new "IV" mechanical cam. At this point the car is not drivable for structural reasons but the engine starts idles, throttles up down and sounds pretty good. The car came with what looks like the 1.7 type air filter set up and the throttle body which sets horizontal rather than the typical vertically positioned throttle body with the larger square type air filter set up.
With all that important info out of the way, I have many questions. Is this a 1.7 injection installed on a 2.0 engine? if it is, is it a huge deal? Will the 1.7 injection automatically adjust to the larger engines demands for fuel. Most importantly what specs do I use to tune the engine? Thanks Gunn

[Gunn1]

Gents

This is what is currently in the car, and how the ID numbers correspond with the numbers in the D-Jetronic Parts Analysis and Troubleshooting
ECU=
022 906 021 E (Bosch 0 280 000 037) ECU use only with the 1973 2.0L engine.
MPS=
022 906 051 C/0280 100 037/use on 2.0L 1973 NLA. GA0 000 001=>GA0 006 765
TPS=
039 906 111 A/0 280 120 032/use on 2.0L 1973-1976
CHT=
311 906 041 A/0 280 130 012/use on 2.0L 1974-1976

Sort of looking like the car was a 2.0L and when the engine was replaced because of the broken case they used a 1.8 or 1.7 case ?

Remember the ID number on the case WO111578? what does this ID equate to for information?

Thank you