I just went thru this exact thing. Off the shelf Allen head cap screws WILL NOT work with that plate. You need the short head Allen screws. Hard to find locally, fastenal doesn’t stock them either. also, I found the only adapter to that works is the 4G to Holley adapter sold by Speedway Motors. It lines up perfectly and clears the throttle blades where others , you have to grind the openings to match the intake. also, do not get the one that has the WCFB pattern, you don’t need it, and those four extra holes will pool gas. And leak. Been there. I’ll find the link shortly to what I ordered. It was 14.99 off speedway and came with all the studs and bolts and gaskets needed.