Junk Holley carb, or the 2 screws in the metering block.

I have been toying with my 67, and after re jetting it back down for pump gas and not the leaded 112 my uncle was running in it I noticed the 2 screws on the side of the rear metering block are missing.:bigtdown: No wonder my plugs look like they seen a ghost.

EDIT: I should mention I’m looking for the air / fuel screws

you sure the block is drilled for screws?

I’m pretty sure, maybe I’ll pull one off the front and make sure it screws into the rear. Who knows with this carb. Its had some wrok done to it

some 4150 type carbs came with 4 corner idle and some did not. Pull the metering block off and look real close, i have a big old box of old holley parts, so i prolly have some screws

its a 4150 4777-4 I’ll see if I can pull up a PFD or something. Thanks pauly