Do not buy anything from Daryl Finch @ the Junk Yard in Phelan CA

< just coming into this thread. its interesting. if I may offer some suggestions:
if those of you that got ripped off could each can file a complaint with the state attorneys office for his scammy business practices. He has to have a business license and with wrecking yards, many states also place them under state patrol oversight/inspections, etc. There are several ways to apply pressure.
1 complaint wont do it, you need multiple complaints for them to act. This normally leads to at minimum an cursory investigation as the state AGO has a duty to act on behalf of a consumer, which often leads to uncovering other things..like the previously mentioned IRS issues, epa violations, and in the case of a local yard to me...the uncovering of stolen cars being stripped & buried..

You can file with BBB, they have no real teeth, but it creates a papertrail of sorts and public record which helps others looking to research before they buy.

Postal mail fraud can kick in, if you've sent payment via the US mail. Dont expect much of anything from USPS, but again, you are creating history & pattern as well as a legal papertrail. If you paid via credit card, charge back is easy enough.

Finally, you can always file a small claims action. In cases like this, its almost a sure win (he either proves he sent it & that you received or he cant) in that, you can tack on all cost, including travel (you will have to file in his jurisdiction - but sometimes can be done via the web or thru a law office near him), you can then add on lawyer, court/service fees, etc. He cannot ignore a court summons, or he risk a default judgment against him, which then turns into a collective action..a $750 case can turn into $4500 judgement real fast and a super headache for him!
OP - Id start by sending him a registered letter, known as "a pay or surrender" ie: repay the amount paid or put the parts in the mail. Be sure to list date of order, amount paid & how, all info.
Give him a deadline, normally it should be 10-14 days from receipt of the letter.
Inform him, further legal action will take place on day 14 if $$/parts (as ordered) are not received in full.
Following that with no response, you need to pursue it...clowns like this get away doing what they do, because no one stands up to them. it also kills our hobby and the mututal trust we all should - and could have with each other...maybe its just me, but ya, I'd spend $1000 to get back my $750, just to let him know Im not taking getting ripped off and to make his life miserable for having tried to do so in the process. One can also unleash with online complaints and reviews, to help others not get ripped off too.
...or do nothing, which is exactly what scam artist like him hope you do.