mike tkach

that is how i used to pick the engine out of my drag boats,8 grade 8 bolts and 4 pipes welded to the flange seems plenty strong to me.

vintage chromoly

I just run a choker under the intake.

That said, it is amazing what a grade 5 bolt is rated for.
I always worry more about the threads in the intake as apposed to the bolts themselves.

bck

I just didn't want all that weight on the header welds. Creating a leak if there was a weak point was my concern.

endeavor1

Curious if that's your jetting plus a PV or are your PVs plugged?

Full Force

Has PV in front.

getrdunn

Got one of your questions answered. port and stbd are different jetting.

Full Force

I thin k we figured that out to be the secondarys was hanging up a tad, Smitty saw on dyno...

getrdunn

Ah. I tried to keep up my best but missed that one. Btw any projected date to hit the water? Hope all goes well. "5,850".

Full Force

Thinking I will have it running this weekend, hit water in couple weeks, been very busy lately.. boats been as I can get to it..

articfriends

When we got carb we saw secondarys werent square when primarys were, norm says its a common occurrence, could be possibilty why carbs needed different jetting. I never gave it a lot of thought before norm showed me that. The 102 mm tb we tested on my 548 had same issue, once throttle stop was ground on to get throttle blade perfectly square it picked up 10% airflow.