When we ran a full service chassis fab/turn-key hot rod shop a number of years ago, it was always useful to have threaded things around to weld into the frame for some kind of mount, etc.
Here’s a list of all our threaded things for your reference:
Engine Mount Kit - Gen 3 Chevy Inline 6 (292)
Product Details
Brand: Welder Series
MPN: 250000
Country/Region of Manufacture: Canada
Our 292 Chevy Inline 6 engine mount kit provides quality and durability with urethane bushings manufactured by Energy Suspension, ensuring long-lasting performance and vibration absorption. This kit includes 1/4" main plates and four 3/16" trim-to-fit frame plates for a tailored fit. The bushing center is 3" off the block mounting surface, and the frame plates extend 6" for proper alignment. All essential grade 5 zinc-plated hardware is included, and you can add optional 10-gauge frame filler plates for extra strength. This versatile kit is perfect for both professional and DIY installations.
For more info on the Blue Flame engine, here's the Wikipedia listing: https://en.wikipedia.org/wiki/Chevrolet_straight-6
