help with 318 upgrade

yes, will do the compression test first. What about the headers versus the manifolds? Is there a better cam or is that good enough?

thanks

For max HP go with headers, manifolds will be easier fit-wise

That cam (20-212-2) should be fine for the 318

You will have to use AMC style lifters and hollow pushrods to run the magnum heads as oiling through the pushrods is required vs. the stock LA head oiling setup