Budget cylinder heads for a 318

I think its 171-175cc? I'll have to check the pair here. Definitely 170's cc, 2.02 240'scfm
Ootb
Fwiw for comparison
Stock 318 124cc 175-180 cfm
340/360 head 155-160cc 197-228cfm
300-350hp goal? That's a 5500-5800rpm red line motor imo. Excess port volume only hurts this build.
That's how I'm looking at it

Not saying port volume velocity etc.. ain't important. But most are not gonna port and or go with the perfect port size flow etc.. for application especially for a smaller displacement. To me say were looking to get 350 hp out of stock 318 heads we'd be talking probably about at least 10:1 cr and 230 degree cam but with say speedmaster heads you would be able to do it with a lot less cam and cr and would be the more streetable package, to me that's why factory does it this way especially with modern engines like LS and hemi lots of cfm and small cams to make reasonable power, cause making power through head flow is more streetable than larger cams. To a 318 with speedmaster heads would be like starting with a 5.3l LS short block and why put money into 318 heads ?