headers vs manifolds on a 318 2bbl difference ????

Didn't say you couldn't test low rpms.
Seems like you just about said exactly that you can’t. Read below.

273 said:
so they favor top end.
This by itself is false and leads one to reading between the lines, believing, seeing it in a way not intended, assumption….

That’s the way I read it and that also means someone else could as well. I see your statement as false, leading and fully incorrect.

Now if you want to ruin the thread as you always do with a continued argument and twisting of words trying to flip the issue and blame on me as normal, good luck, take a hike, don’t ruin yet another thread of me correcting the high bell out of you, yet again.