Reminds me of this build:
Analyze This 316 cubes making 430 Hp and 430 Tq. All that with only 195 cfm peak flow, that's 2.2 HP per cfm and a 145 cc port
They filled the ports in from 152 cc to 145 cc
"The intake port is way smaller than the original. ,think the factory was 152 cc and now it's down to 145 and it's much higher. It's got a small cross section of 1.91 [square inches]." Final flow numbers ended up around 195 cfm on the intake and 170 on the exhaust. Though not huge peak flow numbers. he claims they were almost at those numbers by.200-inch lift. Just perfect for limited camshaft and rpm range applications.
