Looking for advice on these. Do any of these hit the bowl right. What kind of results have you seen with them?

 

No experience with those

But i do have 370's, and they are not the correct spray pattern for my truck, so it does have some minor surging, can be controled with GSK tensioning, and right foot behavior tho..

A nice increase in power for a bargain tho..

Rick

 

I have the 300's and am satisfied. Since they're marine style I suspect they don't have the exact right spray pattern for our truck's. Supposed to give you 40 hp increase , and I would say that's about right with the change I felt.
I didn't want to go any bigger because I tow a heavy travel trailer several times per year and didn't want to watch egt's all the time. Mine are easily controllable. I can get over 1250 degrees on a long uphill pull so I pay attention at those times.
Hope this helps.