When redoing a project car, I have always advised that the owner of the project should be thoroughly versed in such work, meaning he/she should be able to do the work on their own. (How else can one judge quality of work or correct practices of their workforce)
If you become wallet holder, you will get very badly stung and ripped off. And in the end have a half baked car.
E.g. the hvac box should have been taken apart by yourself when the car was in denter painter stage, and you could have rebuilt it at your own home, its a very simple but time consuming job. But its effect on the ac/heater performance is phenomenal. This way you wont have to “minnat and samajatt” your ac mechanic to do it.
Similarly, you didnt know how to measure quality of work when redoing internal engine repairs as you are 100% relying on the mechanic to do a factory perfect job.
There have been literally thousands of projects on pw and all had one common trait, wallet holder project managers got a bad result, and hands on people got the best result.
Anyway, you live and learn. - and I saying the above from experience of a car repair business, in Pakistan a lot of finesse is missing due to crude approaches to a job, e.g. denter ustaad start to mangle plastic clips with screwdrivers rather than make the right tool for them and then actually storing the pieces properly so they can be installed like factory again,
Or lektrishann ustaads who literally use nitto tape as insulation in engine room and dont bother with actual proper cold crimping a joint and covering with heatshrink then plastic looming the whole thing.
Such finesse jobs are best handled by project owners own hands.