I know what the cosworth can do. We have a couple guys locally that have them and they perform FANTASTIC. I just can't drop $12-16,000 on a longblock. That just doesn't fit my budget.
The reason I put this in proven power bragging is because. People that have them and have had them for a while now post and they have say 60,000 miles on the motor pushing it hard, then that is fairly proven and is worth bragging
I know 4st-Air has the Sig. shortblock with stock heads. I wonder why he hasn't posted up!?