1975 starter issues, Starter doesn't disengage Options

[Bryce]

Hello guys new to this forum, but have had multiple 914s,I'm working on a 75 with starter issues. Had a friend bring his 914 to me to work on carburation etc... When he got here I when to start it and nothing so checked wiring and it was fine. Tryed jumping starter it was locked up solid. He live about 3 miles from me and stated that he did here some grinding type noises . He just had a remanufactured replacement starter installed. I told him to get another so he did same thing Bosch reman. I installed it and it's doing the same thing once you turn the key to start it, it doesn't disengage. I've changed new ignition switch new starter relay(aftermarket). I'm at a total loss, and very frustrated doing this as a friend and am over it. Any suggestions? Also I pulled starter bolts out and grounded body to run starter in the open and running or bench testing it the solenoid doesn't push out. I thank it's possessed. One other thing is he had a shop swap his injection for China 40idf carbs. Of witch they don't have any vacuum ports in them or the manifolds, should it be ok to tap into the Manifold for distributor vacuum?

[Bryce]

So one solid yellow and one yellow with red stripes? And what is it I'm bypassing?