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Aurora40 · 10-22-2006

It seems the general consensus is that the 4-bolt isn't actually that much stronger.

It's not a two-bolt like on a SBC. There is a ladder frame, kinda like having a deeper block split horizontally at the crank. So the two bolts are holding that ladder at each point, not just holding a little U over the crank.

It seems if you are going to modify it, the potential is about the same for both engines. If you keep it stock or mostly stock, well the later one has 30 more horsepower.

10-22-2006	#2
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,704	Re: 2 vs. 4 bolt mains ? It seems the general consensus is that the 4-bolt isn't actually that much stronger. It's not a two-bolt like on a SBC. There is a ladder frame, kinda like having a deeper block split horizontally at the crank. So the two bolts are holding that ladder at each point, not just holding a little U over the crank. It seems if you are going to modify it, the potential is about the same for both engines. If you keep it stock or mostly stock, well the later one has 30 more horsepower. Last edited by Aurora40; 10-22-2006 at 01:48 PM.