273 commando Build

318willrun said
That's not a deal breaker. Putting 340/360 size port intake on 273/318 size port head is ok. I've done it a ton, and always have had great results.

most people say the larger intake port ld340 is not good on 273-318 ports . It hurts the velocity flow. Air /fuel mixture is not moving like it would with the correct port diameters . So they say !