Maybe so without porting. Would take more than a "simple" port match. Getting that deep into it, I would have the gasket grooves welded up, then start the porting process.
And after checking mine tonight when I got home, I'm curious I'd there is enough meat there to work with. I'm thinking the runners may need to be built up where they meet the flange.
It is a shame the Modman from Indy get such poor reviews. This scenario leads one to wonder which is the better route, welding and port matching the Edelbrock, or creating a divider in the Modman to promote distribution and carb signal? I've not found much info on the Modman on engines over 392 ci., perhaps the Modmans shortcomings reduce as displacement increases?