273 time to 'fish or cut bait'...

66fs said
The 273 will do all you want it to do. The $100 engine seems cobbled from the little I can see. The intake is a newer 360/318 intake. Not a fan of using one with the smaller 5/16 intake bolts at the early angle, but it has been done and works. The carb should be a Thermoquad or Quadrajet on that manifold. If you have the adjustable rockers, use a solid cam. All 64-67 273's had solid lifters and adjustable rockers. Have to agree with Yellow Rose. Isky E-4 or Racer Brown cam. Get the lifters and springs that go with the cam and use a good double roller timing chain. Run the 2 barrel pistons. Check the head castings first though. I thought the 273 you had was in running condition?

I used a Isky E4 cam in mine. It is a little bit bigger than the stock HP273 cam and is a solid lifter cam like the original. I also used the Egge L2222 hi compression pistons. Although they are advertised at 10.5/1 with a valve job, possibly new valves and thicker head gaskets you will end up with somewhere around 9.5/1 The 273 heads are very efficient. And just to correct a previous post, all 64-67 273's had solid lifter cams and adjustable rockers. Please get us the casting number off the heads. The engine build relies on which heads you use. 2 barrel and 4 barrel 273's had closed chamber heads until 1968. We need those casting numbers.