Im about to drop my new motor (350) in and i started looking at the pan and realized the stock 350 pan from summit may hit the engine crossmember, so i took a look at the original 305 and its pan has what looks to be a designated wave formed in the pan for k member fitment. Do i need to use my stock 305 pan on this 350 or will the stock 350 pan fit? sorry searched everywhere couldnt find this exact answer. dont wanna go with the trial and error method as i may squash my brakeline across the k member

 

All 3rd gen oil pans are a tad different than most, because there has to be enough room in front of the pan for the exhaust (between the pan and the crossmember).

 

ah thats another thing i was concerned about. thank you! so my best bet is take off my 305 pan clean it up and put in on my 350? it should fit okay being that they are both one piece rear seals?

 

That would be fine.
I wish somebody had told me about the exhaust thing before I put in my 350, hooked everything else up, then went to put on the y pipe and the sump was in the way, leaving me to pull it all back out to put my original pan on.