For a unibody car that is going to get a built engine or extensive floor pan replacement, it is my opinion that sub-frame connectors are a must. Here are some connectors that I bought from a fellow that got them from Dearborn Classics. I ended up not using these. After my friend, Jim, and I looked them over thoroughly we came to the conclusion that we could build better ones ourselves.
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This is what we came up with. We took measurements and decided to use 1.5" x 2.5" tubing that was about 1/8" thick.
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I painted them with Zero Rust paint and you can get an idea of what they look like compared to the pre-made connectors.
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These pictures show how we welded them on and what they look like installed.
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