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GregP · 10-06-2015, 08:36 AM

I am not sure as to why they would do that, unless it's just there weird way of introducing something metric to the block or maybe it was just a freak thing they did without realizing it. those things have happened,lol but if your looking for a great 305 replacement thats all standard threads check out the this. Dart#301-31151411 it's a beefy 305..

10-06-2015, 08:36 AM	#2
GregP Junior Member Join Date: Aug 2015 Location: Hattiesburg, Ms Posts: 53 Likes: 0 Liked 0 Times in 0 Posts	Re: Gm performance 305 block I am not sure as to why they would do that, unless it's just there weird way of introducing something metric to the block or maybe it was just a freak thing they did without realizing it. those things have happened,lol but if your looking for a great 305 replacement thats all standard threads check out the this. Dart#301-31151411 it's a beefy 305..