I dunno, if you need me to measure a 914 flywheel, I have one on the 1.8 Core... not sure, but I think the bus flywheel wouldn't work at all... I think the Bus flywheel is smaller, and wouldn't hit the starter...
compare your old clutch to the new one? maybe PP sent the wrong part... should be a 4-spring 215mm diameter clutch, or a 6 spring...
btw, you have to love pelican's marketing:
There are two types of clutch discs available for the 914-4. The stock disc with four springs, and the early 911 disc with six. The 911 disc will give you a much better feel for only a few more dollars, and is a direct replacement for the 914 disc....
4-spring $68
6-spring $172
over a hundred bucks is now "a few dollars"
glad I bought a 6 spring sachs clutch for $70 off ebay