Main Bearings Spacers

[blykins]

That's a pretty radical cam you're using....especially with that high of a stall converter, you're gonna want a combo that breathes better in the higher rpm ranges....for instance, the combo that I have wouldn't make it at all.....

There are better experts on here that can probably answer your question better than I, but if I were you, I'd go with one of the kits that has a shorter stroke....383....396....408...something that would make lots of power, but at a higher rpm range.

The TFS heads will make power with anything....it's a great head. I wished I knew then what I know now....I would have went with them. I think I could have gotten an extra 25-30 hp with them. Oh well.....hindsight is 20/20.

But to give you an opinion on what I'd do....I'd probably go with a 4.00" stroke crank....6.125" H-Beam rods...with a 4.030" bore, that would put you at around 408ci...and give you the revs that you need with that converter and that cam.

Now, you said you wanted to run N20? I'd say you could get 500hp with the above combo....I really don't know why you'd want to juice it, but if you did, you might wanna look into dropping the compression ratio quite a bit....maybe down to 8.5 or 9:1. And of course, like we mentioned before, you'll need to Loc-wire the heads.....

Again, that's my opinion....I'm sure other members would have different ways of expressing what they would do.

I'd stick with a good name brand rotating assembly....Eagle, Scat, Callies, Carillo, etc. You get what you pay for. If you decide what you want, I can probably find you some vendors who can sell you the whole kit...already balanced and ready to install.

Let me see if I can find those heads for Desktop Dyno, and I'll get you a good hp/torque estimate with your setup.