Need help NON mopar 1967 Pontiac Lemans 326

We've all tried to explain to him several times that Pontiac did not make s 307. He ain't gettin it.
The coolest things ,about Pontiac ? Everything pre somg was interchangeable. Other than the '66 -'67 valve change angles ( If I remember , correctly...), Engines were designed , to be killer torque monsters. Had a '72 Formula Firebird , that I traded a '69
Had an Indy 500 edition Firechicken in the shop not that long ago, 4.9 Litre Turbo, oddly configured intake ports. All I know is they were a snack for My Buddy's 400 T/A,
around '83 or so, not close. The turbo doesn't look any bigger than a T-type Buick, We had an early T-type Riviera, think it was an '83 I think.......
The Guy with the Catalina spun a rod brg. in the 400, so He dropped a 301 in to run around while he built a 455 for it, talk about ridin' a torque curve rollercoaster!!!
Stuff a Well designed 455 in it , reconciliation of turbo designed..will make life FUN. Now ,those pesky smog laws.