Need 318 Gurus

That orange engine is a 67 318. For sure....It has Swirl port heads on it, only casting number on them is 714. The last year for these heads....


67 318's and 273's had 920 closed chamber heads, and there was another number that I can't recall right now....

Then in 68 they switched to open chamber heads... 67 was the last year of the closed chamber heads on the 273/318...