WayneC

I don't think your membership includes access to back issues; new issues are mailed to you. So depending on when you paid your membership, you may or may not get the "latest issue". Unfortunately, I was late renewing, so I don't have that issue, either.

If I were you, I'd take a flyer on this kit: https://www.ebay.com/itm/274665822843?hash=item3ff35bda7b:g:OEkAAOSwjR9gFZj- If that doesn't work you're not out much money. I also mentioned the "generic" antenna mast repair/replacement kits being sold on eBay; consider sending an eBay message to one or more of those sellers to see if they can tell you if they have a kit that works with your Harada antenna. Any number of new power antennas would work, the only issue being how to mount them. If you're willing to spend the money, any stereo installer can sell & install a new universal power antenna for you.

The reason they are different is that Avanti II switched to a GM steering column with the ignition lock in the column, so it requires a GM-style ignition key; Avanti Motors continued using the original door handles/locks; the door lock cylinders are Studebaker (different than the column cylinder) hence different key types. Same issue with the glovebox lock; besides, in most modern cars the glovebox often requires a unique key so that a parking attendant (who needs the ignition key to park the car) does not have access to the glovebox (and by extension, the trunk, since the trunk button is inside the glovebox)

From your photo it looks like your telescoping antenna is crimped, so rather than the new unit on eBay, if your motor runs perhaps you can find a cheaper HIA antenna being sold for parts that may have a good antenna.

https://www.ebay.com/itm/353155441986?hash=item5239b46542:g:OGsAAOSwcOBfI4z~

Can't answer your question directly (hopefully someone else may have wrestled with this issue), but I've replaced power antenna units on Jaguar XJS. Also I replaced just the mast (and the plastic cord insert inside it) on a 1993 Toyota (like this part on eBay: https://is.gd/Y4caI9 )... don't really remember much about that except it was easier than I thought it would be and the part came with instructions; you could contact the seller of these eBay replacement masts, giving them your antenna shaft diameter and extended length measurements to see if they have one that would work. Since you have the motor removed, are there any manufacturer markings (model name/number) on it, such as "Hirschmann"? If so, Google whatever info you find to see if you can source Hirschmann replacement parts. Also, there are universal replacement power antennas on eBay (quality unknown): one claims to fit '66-'90 Avanti. another for '72 Avanti, another that supposedly fits '66-'77 Avanti, etc. Last resort: try Avanti Motorcars: https://is.gd/MirTIh (their website is sketchy, you'll need to phone them).

I'm not all that knowledgeable on sunroofs, just collected info in case I needed it. I think the ASC info may have come with the papers I got with the '80 I owned, so I assumed it referenced the sunroof on that car... don't know if they still carry parts for that sunroof model, or even if the company is still in existence, you'll have to research it. I misspoke about "email" (there's no way I could get your email address) ...check your profile to see if there is a message there for you.

I don't think there's anything special about the gas cap, your Avanti should have a standard filler for unleaded gas, so any low-profile gas cap meant for unleaded fuel should be OK (it just needs to clear the filler door, and since the gas filler door locks, there's no need for a locking cap). I formerly owned an '80 Avanti with a sunroof and collected some info about them as I came across it; I emailed that info to you just now. You may be able to find seals here: https://secure.cougarpartscatalog.com/Mercury_Cougar_Sunroof.html Car cover: you did not say where you live... weather is a very important factor in car covers; one piece of advice: if you live in a dry sunny area, avoid Budge car covers, I've had several and they don't last anywhere near as long as they claim.

http://www.chevy-camaro.com/chevy-camaro-chevy-engine-block-codes.php?group=6

The photos I posted above are for a 1980 Avanti that belonged to me. That car was sold in early 2019 and the new owner ordered seat covers from Lseat; he sent the old covers to them to use as a pattern. It took them some months (I believe the covers are made in China) and he called Lseat numerous times, but he finally got them and said he was happy with them.

Oops, meant C & E (not B & C) Try

Studebaker International (catalog: last page, center column, items B & C) https://www.studebaker-intl.com/catalog_pdf/weatherseals_belts_pulleys.pdf

Almost any parts dealer that carries Avanti parts can likely supply weatherstrip... here are 2 of the major sources: https://www.nostalgicmotorcars.net/store/c14/Weatherseals.html#/ https://www.studebakerparts.com/studebakerparts/store/s/agora.cgi?page=rubberkits.html

Dunno if this will provide any additional info, but I remember reading years ago that, early on, Avanti Motors bought base Corvette engines in batches. If that is true, early original Avanti II engine casting numbers/hp would likely be: 3782970 (327ci 250hp) 3858174 (327ci 300hp) 3892657 (327ci 300hp) 3914678 (327ci 300hp) 3932386 (350ci 300hp) 3970010 (350ci 300hp)