what to do with my 273

I'm almost positive that the heads I had were closed chambered and yes it took the first two years intakes cause of the intake bolt angle. Not sure on the 66 and up as far as the closed chamber goes. As far as I now the 66 up took the regular angle intake bolt and had bigger wrench heads on them also.

I think that Mopar Performance and a 318 head with 360 vavles and claim it could make something like 50 horse difference on a 318. Same small port just with a little bigger valves.

I would think that same trick with the 273 closed chamber heads and a zero deck piston would make a killer little 273. I would bet a stock 340 cam with the above sinero(spelling) would be like wow.

Lee