Samuel: As you well know your 1965 ford mustang came to me as a basket case. I have spent out of pocket over $4500.00 to try and make this project functional & relaiable and show my personal concern. One thing for sure I will never put an engine in a car that is NOT road ready. I have up held my end of the job even though 2 engine suppliers failed me, as well as defective parts of all sorts. Older cars need a lot of attention and tinkering as well as good quality parts that are very hard to find in today's market.
I will, once again , at NO expense to you, get your Mustang running due to poor quality componenets from major suppliers as far as the engine goes. I am sure you will experience furthur issues due to age of your vehicle and circumstances involved.