450bench, that is a really nice and tidy looking little Vega you've got there. Put another temp gauge in the cyl. head and you will have a 3rd temp reading , Hah ha
FYI,
I put a rompin stompin 427/425 horse type rat in a '78 Camaro, back in 1986. Pulled the factory 305 out and used same OE mounts. Had a Holley Strip Dominator with an 800 dbl pumper and there was no way the flat hood would even come near closing with any type of breather IIRC. Ended up...
Mine is a GM 14013520 from about 20 years ago. I recall at that time that the look or fit of the aftermarket hoses (Goodyear, Dayco and Gates) sent me back to the Chevy dealer for what I felt was a more correct, better fitting piece.
biker, I have a 1980 Z28 that was ordered with HD cooling. I replaced my upper rad hose quite a few years ago with a GM part. I can try to get the number for you if you still need it.
I believe they are referring to the smallest more round than oval, ports that were often scorned and used for door stops or boat anchors. See pic in next post