Edelbrock STR-12 lid

Years ago I made one from 1/4" flat stock. For carb mounts I used two carb spacers that were angled - Moroso's IIRC. Many of those STR type manifolds lost their tops due to backfires in that huge plenum. I'd add some type of blow off valve or burst plate, and always remember to NEVER pump the gas before turning the motor over - always get the crank spinning, THEN pump the gas.