I rebuilt and rebushed my Qjet, but it came from a 12 bolt manifold, and now my new engine is vortec top end(8 bolt). Doing so loses the "Heat box" bimetallic box that controlled the choke. So my choke is basically in-op. Like to convert to electric, but unsure if what electric chock or parts are needed to do this. So, instead of chasing my tail for weeks instead of actually boating, I was considering just getting a new carb. BTW, my new Vortec edelbrock manifold is dual pattern so it will fit a square or spread bore carb. Personally I like the spread bores, great economy and power on tap.