'63 l75 valve cover question

[Bruce G.]

6th Ed. JG states - L75 300hp eng have a second black and gold rectangular water-soluble decal indicating 300 on upper edge.
7th Ed. JG states - L75 300hp motors have 'no' hp decal.
1963 Corvette Shop Manual clearly shows pic in Sec 6-10/Fig. 14 300hp decal.
Noland Adams Vol.2 pgs 55, 126 (pilot line car) and 155 all with 300 hp decal.
I'm in process of restoring my covers and need a clarification from NCRS judge to confirm decal or not............car is to be judged.
Appreciate your comments, Bruce Green #39901

[Bob R.]

Re: '63 l75 valve cover question

The 300 hp has a decal the 250 does not have a decal.

[Bruce G.]

Re: '63 l75 valve cover question

I have had 4 L75 '63's over the past 45 years and always knew the 250 and 300hp decal difference. I wonder why the latest JG has it as having no decal or is the manual mistaken.............which I believe may be the case, until proven different I will adhere decal. Thank you, Bruce

[Wayne Y.]

Re: '63 l75 valve cover question

I literally just recently heard from a long-time '63 300hp owner who recently scraped his decals off (along w/some paint) because of what the 7th Edition said on that topic. Unfortunately, he's now in the process of repainting the valve covers...and will then reapply the decals. Yes, the L75 should have decals.

[Alan D.]

Re: '63 l75 valve cover question

From past conversations (early 2000) Bob has it correct, we are not talking about the 3832180 (327) decal on TOP of cover.

The 300 hp has a decal which denotes the optional 300hp engine for the corvette.

the 250 does not , base engine does have an additional decal denoting a 250hp.

which seems to be what is being said, yes?
Took a look at my notes which mentions that the 250hp is base engine for Corvette,
but optional for pass car therefore the pass car did get a 250 HP sticker when tho optional motor for pass cars was ordered.

So those engines with the 250hp decal are from pass cars hence the confusion.

AIM does not have a listing for optional 300hp motor.

[Gary B.]

Re: '63 l75 valve cover question

Alan,

“… which seems to be what is being said, yes?…”

Said by whom? People in this post? Or the 7th edition of the JG?

Gary

[Wayne Y.]

Re: '63 l75 valve cover question

Alan - yes, that's what we're all saying. The 300 hp does have decals on the valve covers. The 250 hp does not. However, the new (7th Edition) 63/64 Judging Guide indicates the L75 300 hp motors have 'no' hp decal. It's in error.

-Wayne

[Alan D.]

Re: '63 l75 valve cover question

So here is some more info, note the artist engine for the standard engine: 250-hp Corvette V8 has NO hp on the side while
the optional 300hp engine does. Sorry do not have a reference back to GM for these drawings.

As for the JG - that is not GM proof of how it was, it's just NCRS's best present guide for judging. Errors have been found over the years hence new editions and those JG when new still have errors - we aren't perfect.

[Bruce G.]

Re: '63 l75 valve cover question

Manual on cover states "INCORRECT OR INCOMPLETE INFORMATION MAY APPEAR" and input should be forwarded to the '63-'64 National Team Leader (Carlton Colclough) which I will do. Thanks again for all your comments. Bruce

[Gary B.]

Re: '63 l75 valve cover question

Manual on cover states "INCORRECT OR INCOMPLETE INFORMATION MAY APPEAR" and input should be forwarded to the '63-'64 National Team Leader (Carlton Colclough) which I will do. Thanks again for all your comments. Bruce

Bruce,

That is the process. Please update us via this thread when you get a response.

Gary

[Bruce G.]

Re: '63 l75 valve cover question

IMG_0277 (1).jpg'63 L75 valve covers..................still no response from team leader. Hopefully no deductions. Bruce

[Mike D.]

Re: '63 l75 valve cover question

Looks correct to me, and you have the triangles on the raised portion. Bruce, are you one of the 63s being judged in August?

[Harry S.]

Re: '63 l75 valve cover question

Please remember that the valve covers are stamped with an O. The O goes up. The valve covers are not symmetrical, so if the O is on the bottom you may be interfering with the lifters and get noise. The O is in the area I circled in white. The O is on both covers. The judges will check and deduct for this if it's on upside down. That's 20% for installation on one because you can't mount the left side upside down. They may deduct if it's missing as that's a tell-tale sign of a reproduction part. That's 20% for configuration. Then if they consider implied date on the reproduction covers that's another 20% or a total of a 9 point hit on the valve covers.

IMG_0230.jpg

[Bruce G.]

Re: '63 l75 valve cover question

Yes Mike................of course all depends on a nuclear disaster in the mean time. Hopefully see you and Tammy there. Stay well, Bruce

[Bruce G.]

Re: '63 l75 valve cover question

Why is there no mention of the 'O' in JG?