My 1964 Dodge 440 2 door hard top has a horizontal crack about 6 inches long on left front inner fender just above shock tower. Its even pulling spot welds loose from the gusset under the inner fender. I raced this car a good bit in the 80's & 90's but not a race car ran high 7's in 1/8th. Took it apart about 10yrs ago mini tubbed, moved springs to frame, tied frame rails, put 66 kframe in so had to modify trans tunnel. That's when I found crack. Shock didn't seem to be short but cant think of what else might have caused this. What would be a good fix? Started having a lot of back problems and left car on jack stands since but would like to ride in it one more time before I kick the bucket.

Thanks
Tim