I am in the process of replacing the clutch, flywheel, etc. and other seals. This one was leaking as evidence of oil prior to cleaning. This is a 74 1.8 liter car.
Question is best way to remove from tranny without scratching the surface. Click to view attachment Click to view attachment

Screw in a self tapper and slide hammer or pry it out. I never did this on a 914, but have done it on many others. Just be careful.

Here's what Super In Law and I came up with.
Custom seal puller. So it fits inside the bell housing.
Quick and dirty. But ......................
Rest the lever on a scrap of flat steel so you don't dent/knick the outer edge.

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The arrow shows the spring rim. That's about where I go in.

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New design on the custom seal puller..!

That's what I did, just make sure you don't drill in to far and only put the screw in far enough to get a good "bite" on the seal,you may need to drill 2 holes,not sure as mine came out with one.
I used an install tool I made years ago for T1 swingaxle and IRS box's.
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I purchased a seal puller and within seconds, okay a minute had the old one in my hand. A solid $15 investment to make sure I didn’t mess up the sealing surface. Thanks for the suggestions.