I went to my "Nut and Bolt wholesaler and got the best they had for pennies! To get the correct size just put the exhaust manifold in a vise on it's side. Put a bolt in the hole and note the distance the threaded end comes out of the manifold. Do this for each hole. You will be able to discern which bolts go into which holes based on the how far they come out the head. It will be either "Bolt is too long", "Bolt is too short" or "Bolt is correct length". I believe there are 2 or 3 different size bolts
#16 350 HO heads rock!.
Engine Test Stand Playlist: https://www.youtube.com/playlist?list=PLwoxyUwptUcdqEb-o2ArqyiUaHW0G_C88 restoring my 1968 Firebird 400 HO convertible (Firedawg) 1965 Pontiac Catalina Safari Wagon 389 TriPower (Catwagon) 1999 JD AWS LX Lawn tractor 17hp (my daily driver) 2006 Sequoia 2017 Murano (wife's car) 202? Electric car 203? 68 Firebird /w electric engine 2007 Bayliner 175 runabout /w 3.0L Mercuiser__________________________________________________________
