... I think a distinction should be made between "restored-restoration" (Judged - compared to as when the car came off the production line) versus "resto-mod"(what is in the minds eye of the builder)
Let me just put these here..... Note the engine build began 1st....
https://grassrootsmotorsports.com/forum/build-projects-and-project-cars/litlphant-the-baby-hemi-from-japan/151728/page1/
https://grassrootsmotorsports.com/forum/grm/oldeskewltoys-mark-ii-aka-i-found-a-host-for-the-hemi/162984/page1/
btw, Surreptitious, my current "resto-mod" began as an engine build too
1) Starting With the Wrong Car - hahahahaha... it would have been nice to start with a "better" car... but sometimes you get what you get - you take a leap of faith.
2) Not driving it first - That is a big part of resto-mod is making them more current road worthy. It helps that I've driven many cars from the era of my projects
3) Rebuilding the Engine Too Early - As I've already noted... both of my resto-modded projects began with the engine. The engine build motivated me onward.....
4) Skimping on Metalwork and Paint - AGREE 10,000%
5) Checking (Not) References: If you have been inside the car biz for long, you learn who to trust... with what.... or what not.
6) Buying Parts Too Early - I beg to differ... this ASSUMES the parts will be available later...... if there are parts houses that stock YOUR cars parts... all well and good.... but if you aren't restoring a car with a parts supply... you get what ever you need, and deal with potential duplicates if it occurs.
7) Forgetting Why You Started - motivation... it isn't easy to stay motivated... In my case most of my builds are about some kind of creating... making it unique.
8) Skipping the Sorting Stage - The one area in Surreptitious that could have been better... The current project I want to be much better
9) Not Admitting Mistakes - the only one you are lying too... is yourself.... unless you are a shop
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10) Budget - expect(PLAN ON IT) to spend 50% more then your best estimate - when all is finished, if you spent less than 50% more be happy