Nice find, I’m jealous!

You may have a challenge squeezing a 5.3 in there but I’m sure it’s doable.

Here’s my 38 I did back in 03. 350/350 and pro street rear (what was I thinking?) from a 75 Camaro.

Look forward to seeing your progress.
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Dan

35 CC Case
38 Chevy Pickup
51 3100 AD
58 3100 Apache Fleetside