Steve, I just looked at an article and the builder named several cams for the 273 and guess what was at the top of the list, you guessed it, the one you have. He also says the only thing needed is the matching springs.
I'm sure you have a problem with cam timing. i ran a 484 in a 318 a 535 in a 340 and a 606 in a 440, all way above the stock lift and had no clearence problems. you are either opening to soon or staying open late. pull the heads, yea your gonna need new gaskets and check your pistons and get a proper TDC. install your head without a gasket and check the specs of the cam against the card.
maybe its just the factory springs binding up...
My thinking also. Have your cam in the 273 commando in my Valiant with absolutely no issues, but my heads have the comp cams recommended springs. Also from my experience definitely adjust your intake/exhaust to the cam spec sheet numbers not factory numbers. These springs are cheap. You need them.
http://www.summitracing.com/parts/CCA-901-16/
That's what he has.
That's what he has.
Have your cam in the 273 commando in my Valiant with absolutely no issues
Google printable degree wheel there are lots of sites, just resize and print, cut it out and fasten to a piece of cardboard
did you have to degree this cam when you installed it?
Ok well I think we fingered out the problem, but wont know for a couple days, we gotta replace 2 bent push rods then re-check it......
C'MON Steve don't keep us holdin' our breath like this
XS2 !! what is going on ?? LOL
I'm sworn to secrecy. LOL