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Back in an OBS.

1970Custom

They call me Spuds
14,107
447
Middleton, ID
4" inch from turbo not easy on obs, and for the difference with no tuner It wouldn be worth the hassle. Just 6637, nice exhaust and enjoy it.

That's why I mentioned the non smashed aftermarket dp. it helps greatly on a stock OBS PSD. Powder rods tend to limit your power numbers anyway.
 

taxreliever

Licensed to Represent!
14,695
287
Maine

SuperCab

Moderator
Staff member
10,068
547
Montana
I always thought the last obs 7.3s were the strongest... 1996/7 and then the super duty was slightly less strong, but still stronger than the 1994/5 7.3s
 

1970Custom

They call me Spuds
14,107
447
Middleton, ID
I always thought the last obs 7.3s were the strongest... 1996/7 and then the super duty was slightly less strong, but still stronger than the 1994/5 7.3s

Okay, so did some digging. I was told that the SD 7.3 was forged and the OBS was powder; BUT, searching says UP TO 2000.5 was forged.....
 

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