67 Deck Lid Hardtop Mount Holes

[Dereck S.]

I have a 67 Roadster that according to the tank sheet did not come equipped with a hardtop (soft top only). When it came from the factory what fastener or plug was installed in the rear deck two holes? Was there a ferrel plug in the holes or did the factory install the same hardware that would be needed with a hardtop?
Dereck

[William C.]

Re: 67 Deck Lid Hardtop Mount Holes

No holes were drilled without hardtop.

[Dereck S.]

Re: 67 Deck Lid Hardtop Mount Holes

Thanks William, I was afraid of that possibility. My holes were likely either added or the deck lid was changed sometime during its life.

[Kirk M.]

Re: 67 Deck Lid Hardtop Mount Holes

To answer your question though, it is my understanding that the holes should have the mounting bolt, nut, and rubber washer in place to be NCRS correct. Not the ferrel plugs, which by the way I think look much better and if I wasn't getting the car judged, I would use.

Kirk

[Wayne M.]

Re: 67 Deck Lid Hardtop Mount Holes

No holes were drilled without hardtop.

In fact, I believe that for C2 convertibles, there were three different rear deck lids on hand at St.Louis and Ionia; (a) the usual one for soft top only (no holes for hardtop); (b) the "lid assembly" with oval holes for the soft top latch assemblies [as in (a)] plus 4 additional holes for the hard top; and (c), hardtop-only cars, with no oval holes cut for the latches.

At swap meets, this latter version (c) is really rare, and may never have been available as a service item from the General.

[Dereck S.]

Re: 67 Deck Lid Hardtop Mount Holes

It's amazing that GM managed three different configurations on the assembly line. I'm curious about the bolts. The bolts on my deck are chrome, hole in the threaded end, and a capitol "R" on the head. See attached image. Are these original bolts or a repro? I see no "R" on the bolts in any of the aftermarket parts catalogs.
Dereck

[William C.]

Re: 67 Deck Lid Hardtop Mount Holes

Probably Repro... Per. JM The head is a flat carriage bolt, stainless steel with no marking. In the past I had two 67 hardtop cars and they had no marking.

[John H.]

Re: 67 Deck Lid Hardtop Mount Holes

In fact, I believe that for C2 convertibles, there were three different rear deck lids on hand at St.Louis and Ionia

Wayne -

There were two deck lid assemblies at both plants - one with convertible rear bow latch holes (#3871086), and one without (#3871090); when a hardtop was required (either as a substitute for the soft top or as an optional second top), the four hardtop hold-down bolt holes were drilled in the lid in the plant. 2-top cars used the lid with the oval holes already present, and hardtop-only cars used the one without the oval holes.

[Michael H.]

Re: 67 Deck Lid Hardtop Mount Holes

I'm curious about the bolts. The bolts on my deck are chrome, hole in the threaded end, and a capitol "R" on the head. See attached image. Are these original bolts or a repro? I see no "R" on the bolts in any of the aftermarket parts catalogs.
Dereck

The bolt in your picture would be the GM replacement that was serviced starting some time in the 70's. I think it was the same part number as those used in production but probably came from a different supplier.

[Wayne M.]

Re: 67 Deck Lid Hardtop Mount Holes

Wayne -

There were two deck lid assemblies at both plants - one with convertible rear bow latch holes (#3871086), and one without (#3871090); when a hardtop was required (either as a substitute for the soft top or as an optional second top), the four hardtop hold-down bolt holes were drilled in the lid in the plant. 2-top cars used the lid with the oval holes already present, and hardtop-only cars used the one without the oval holes.

John -- makes perfect sense; thanks for the explanation.

Thought I'd post two pics of some hardtop bolt hardware that I've had for decades . First is closeup of head (with rubber washer attached). second is of the pkg. with another 3 washers and two of the "bumpers" [Gr 13.346, #3830940] that go into the end of the bolt -- you can see the remains of a broken-off bumper stem in the end of my bolt (don't know how I'd get it out of there to install the new ones).

Also, notice the depression under the bolt head, making a sealing surface on the underside perimeter, where it contacts the washer; not sure if the repros would have this detail.

[Michael H.]

Re: 67 Deck Lid Hardtop Mount Holes

First is closeup of head (with rubber washer attached). second is of the pkg. with another 3 washers and two of the "bumpers"

Wayne,

The bolt looks like the real thing. No "R" and a somewhat rough finish.

I think the 3831541 washer in your pic is the one that's supposed to go under the ferrule. (between ferrule and deck lid)

The washer used to seal the bolt to ferrule when the H-Top is removed, shipped in the I.P. compartment, would be a 3827499.

Pic below shows the 3827499 washer (above) and the 3831541 (below, mounted on ferrule)

The 3827499 is .600" OD, .360" ID and .086" thick.

[Marco H.]

Re: 67 Deck Lid Hardtop Mount Holes

John -- makes perfect sense; thanks for the explanation.

Thought I'd post two pics of some hardtop bolt hardware that I've had for decades . First is closeup of head (with rubber washer attached). second is of the pkg. with another 3 washers and two of the "bumpers" [Gr 13.346, #3830940] that go into the end of the bolt -- you can see the remains of a broken-off bumper stem in the end of my bolt (don't know how I'd get it out of there to install the new ones).

Also, notice the depression under the bolt head, making a sealing surface on the underside perimeter, where it contacts the washer; not sure if the repros would have this detail.

Wayne,
Did you try to drill out the broken off plastic stem?? A small drill bit should grab the plastic without messing with the bolt.
Hope this helps,
Marco