Ported LD4B :(

@318willrun has some great videos on here about porting 318 heads. Been awhile since I watched them, I don't think he hogs the intake out to 340 size, but the videos are very informative. Will give you some good ideas and a direction. Or maybe you may just want to pop for a untouched ld4b.
Throwing sod is hard work. Roofing is hard work. Porting heads is not hard, but it is time consuming.