camshaft for 225
What is the suggested rpm range for your cam? It should be on the cam card.
For example, I am using the Erson 270* cam and have the rpm limiter set at 5200 rpm. I could go higher, but choose not too.
The head has 1.7" intake and 1.44" exhaust valves. I used the Erson cam kit for the lifters, keepers and springs. The chambers are 52cc and it has a "home" port job.
The block is bored .30 over and has cast pistons and cast iron rings. The pistons set .140 down the bore. I had to cut the block .40 to reach that figure. The rods are rebuilt and use ARP bolts. Final compression ratio is 8.75. The block is a 1978 vintage.
I am using a Clifford intake with a Edelbrock 500AVS carburetor. The exhaust is a set of Dutra's similar to your manifolds. The head pipes are 2 1/8" pipe that are Y together by the transmission cross member. They feed into a 2 1/2" tail pipe, the muffler dumps before the rear axle.
This all sits in a 1965 Dodge Dart with a 1964 4 speed and 3.55 geared 8.25 rear axle. It runs good.