Thanks guys for replies are really helping...

I really understand when you say that you guys say why adapt something that its not design for the engine when there is one that is made for it.

But the point is that Im building an engine to produce about 350hp
and all those rods are the top line (about $500) and can support much more HP that Im intend in this project. Furthermore Im from Brazil so I have to convert the money and pay the taxes... Every $$$ I can save is very important, and I just need something intermediary...

So my question now is...

Earliers Sbc had small bearings with same size of 250.
Despiste the narrow botton of the rod I would like if there is something else that makes impossible use connecting rods like these? (much cheaper) http://www.ebay.com/itm/SIR5700SPLW-SB-C...500a96e&vxp=mtr

Thanks...

Win is what matter. The rest is consequence.
Ayrton Senna.