Steve, sorry to hear about your Dad. I hope I get 97 years.
I looked up several of the herbs in the reckless blood tonic in the German Commission E monographs on the American Botanical Council (site).
Everything seems well intended in that formula. The only thing that jumps out at me is the use of Cinnamonum cassia. Essentially Cinnamon you buy at the grocery store. The Cinnamon that is considered superior is Cinnamonum Verum or Sri Lankan Cinnamon.
The trouble with any dietary supplement, is the quality. Before I gave any dietary supplement to my 97 year old father, I would want to know a bit about it's manufacture. Specifically was it manufactured in a GMP certified facility, and packed/held in a compliant facility. I looked for FDA 483's or warning letter's on David Winston and did not find anything, which is a good sign. However he probably does not manufacture his own products.
Contact the company and ask if it was manufactured in a GMP certified facility (i.e. NSF certification). Ask if they test each finished good lot for potency, contamination, and micros. If they will provide copies of either--even better. You can also ask if they have had any adverse events with the formula.
No I am not a herbologist. I work for a Dietary Supplement company.