1970 340 intake manifold ??

1WildRT said
WHERE THE SP2P shines is on 318/360 Motorhomes... Lots of low RPM velocity, don't expect it to breathe past 3500-4000 cause it can't...

Same for the Streemaster 318
Red marking shows where I'm going to machine it to be effective to 5000, per Garrett Ellison