Need help on replicating the road draft tube used on the 67 L88. I have heard that there is a truck vent tube and can that is similar? need good pictures and diminsions on the above unless some one out there has one. Is the proportioning valve on the 67 L88 used on other applications? Likewise on the master cylinder and power brake booster? Any input will be greatly appriciated.
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Re: C2 L88 road draft tube & proportioning valve
George-----
I don't know of any truck application that used a ventillator assembly similar to that used on 67 L-88s. That part, GM #3883265, was discontinued in August, 1971 and it's VERY hard to locate in either used or NOS form. There are some pictures of it in M.F. Dobbins' 63-67 Vette Vues Fact Book.
The proportioning valve used for 1967 J-56 brakes (a required option with L-88), was also used for 1966 and 1968 Corvettes with J-56. In addition, the Kelsey-Hayes-manufactured valve was used for many Mustang applications in the 66-70 period. The Mustang applications are the best source for "donor" valves, but you'd need to check with a Mustang expert for details.
The master cylinder used for 1967 J-56 was also used for all 1968-72 Corvettes with power brakes. They are not rare.
The power brake booster was the same as that used for all other 1967 Corvettes with power brakes.In Appreciation of John Hinckley -
Re: C2 L88 road draft tube & proportioning valve
The GM blueprint for the 3883265 "tube assy" used on the 67 L88 shows a "make from 3879941 tube assy" used on 396/427 "NASCAR" applications. The only difference is in the tube bends below the attachment bracket to the cylinder head. This earlier tube assy was reported to be used on the L88 cars that came with the header package as the 265 tube interfers with the header.Comment
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