When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
GM had a recall in 71 to add a steel safety cable strap to strap down the motor. The kit was available for about 5 years,
I have never been a fan of solid mount in a street car any more then not having solid mounts in a race car.
Yes, two '68's I had in early '70's received the strap and bracket bolted with the exhaust manifold bolts.
I have done what Kevin suggested with the turnbuckle, cheap and effective.
Yes, solid mounts have a tendency in pulling threads from the block.