Getting more flow without bigger valves or lot's of porting
Here are some things Ive done on the "help me build it series" DNA Aluminum heads.
The heads are the classic "ebay" or Amazon castings, kmj , assault, skip white NKB or the AFR enforcer heads.

2.02 Intake valve and 1.6 Exhaust
Flowed at 28 inches 4.030 Bore
Radius inlet and no pipe on exhaust


DNA heads
https://amzn.to/4e7gOPQ

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