gbody 442

so i swapped in the 350 and 2004r trans a few days ago and could out that the fuel pump for the 307 is slightly different than the one on the 350. the 307 one has an extra fuel line going to it and i assume its for emissions or something like that. the 350 fuel pump doesn't have an attachment point for this line. should i plug it or go with the original fuel pump from the 307? also just for peace of mind (or lack of it) can anybody tell me the PROPER way to seal an oil pan? thanks /Users/jhrhth91/Pictures/iPhoto Library/Previews/2013/06/30/20130630-011254/IMG_0085.jpg

gbody 442

[IMG]/Users/jhrhth91/Pictures/iPhoto Library/Previews/2013/06/30/20130630-011254/IMG_0085.jpg[/IMG]

gbody 442

http://s1314.photobucket.com/user/gb...52e09.jpg.html

gbody 442

http://s1314.photobucket.com/user/gb...3bc47.jpg.html

olds 307 and 403

You can use the 307 fuel pump with the 350. What gaskets are you using? The Felpro diesel gasket is supposed to be the best.

joe_padavano

The 307 pump has an extra line for fuel return. This helps prevent fuel percolation by recirculating fuel back to the tank to cool. You want this. Put the 307 pump on the 350.

Octania

I tried the die&sell pan gasket a couple engines back... too fat [wide] and interfered with the A-body motor mount[s]. Not sure it was worth the trouble.

captjim

Definitely. This will help recude the chance for vapor lock.

Hey Joe, just curious, didn't the older 350 cars equipped with a/c come with the return line?

olds 307 and 403

My 76 Cutlass had no return line, it had A/C.

joe_padavano

Jim,

I would have sworn that they did, but I just went out and checked my 71 Cutlass parts car with 350 4bbl and A/C. It does not have fuel return. I guess I just haven't owned that many small block cars...

captjim

Funny, I goofed around at Rock Auto, early to mid 70s had no return, late 70s did. Can't remember if my 77 did or not?? No matter, just curious.

gbody 442

thanks for the input everybody, il be putting the 307 pump on, right after initial startup just to make sure everything else is in good working order. il be firing her up hopefully tomorrow afternoon. looks like i missed my burnout by the 4th deadline i had set