Re: 1967 gmc
Quote:
Originally Posted by BobBray
Good question! The deal is that the early 305A's with a road draft tube did not have PCV valves. The air came in through the valve cover beathers and was sucked out through the draft tube. Considering that modern engine oil is a lot less likely to turn to sludge than oil was in the old days, you could probably get by with one breather if you change your oil regularly and don't have a lot of blow-by. I would periodically check under the closed valve cover to make sure you don't have a problem developing. Also, put the cover with the breather on the opposite side of the draft tube.
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Thank you Bob - I wasn't sure what the negative affect might be if I did that. I have a nice set of plaids I'd like to stick on the 305A maybe, so might consider doing that after I get the truck painted.
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My 60-66 GMC Projects:
1960 1001 Custom Cab short wideside BBW, 305A V6, factory PB, Hood Jet, Radio and Hydramatic.
1962 K1000 4x4 short wideside, BBW, 305D w/ SM420, PTO Winch
1966 1001 Custom Cab short wideside, w/ super rare Sport Trim option interior (bucket seats)
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