This is an unfortunately common situation. You have some incredibly knowledgeable midget racing folks in the NE who will help you get fair value for this racer's widow. Go to the NEMA website or the EMMR website for contact info and get some guidance before you list anything for sale. Too much great history gets lost in rushed garage cleanouts. The stuff is worth much more with a great and accurate history attached.
He is aways from you but Brian Watson in Philly has been a great resource to racers looking to do quality restorations. I'm sure he would assist if asked. Lynn Paxton is at EMMR. Stan Lovitz is in PA.