Don’t think they do. Why not drill the 5-5 1/2. The centering hole in the drum will keep it true on the wheel I’d think. Add one of those funny looking nut washers like is on the later model drum rears. My coupe fronts are drilled to 5-4 3/4. Using 53-6 Ford pickup hubs.
You can buy a template to re-drill them yourself .https://m.roadkillcustoms.com/wheel-bolt-pattern-re-drill-guide-jig/ Or you can make your own template. You need a piece 1/8" or so metal. ( aluminum is easiest) Mark a center. Draw two concentric circles. One for each bolt diameter. On one of the circles mark the lug spacing. (every 72 degrees) Then use a pair of dividers to confirm even spacing. Do the same on the other circle in between the marks on the first circle. Drill all the holes with an 1/8" drill Drill the existing bolt circle out till it fits very snuggly over the studs. Leave the new circle at 1/8". Cut out the center large enough that the plate will lie down flat on the hub and drum. Take the assembly to the drill press and use the 1/8" holes to pilot 1/8" holes in your drum and hub. Remove the template and finish drilling to the appropriate size for your new studs. When I get out to the garage I'll post a picture of how mine turned out.
Don't know about the availability of drums with the 5x4.5 pattern, but remember that your hubs will have to be redrilled to the new pattern too. Rather than searching for drums that likely don't exist, why not just have whoever drills the hubs modify the drums at the same time?
If you got access to someone with millings machine with digital readout here are the dimensions for 4.5 and 5.5 patterns. I built a mold years ago for wheel pattern checking.
It's usually easier to modify or replace the rear axles with 5X 5 1/2 to match the fronts. Now if you are wanting to match a set of wheels?, Don't. (but this is up to you) My thing is to always modify the cheapest part. I'll not modify the car over a set of wheels.
The normal thing in this situation is drill new holes for the 5 on 4-1/2 if the hub allows it on both hub and drum. Make sure that the center hole of the wheels you are trying to fit will go over the hub before you do anything else. Some of the later Ford wheels have a pretty small center hole
Redrilling the early Ford hubs and drums is the best way to change the bolt pattern but it isn't always easy. Some early Ford hubs have a large center and require spot facing or milling for the new studs to seat properly. As good as the DIY drill jigs are, the radius on the inside of the hub can be a problem with the smaller bolt patterns. It sounds like the OP isn't very familiar with this process. I suggest finding a hot rod shop or machine shop and have it done. As someone mentioned, first check the ID of the wheel and make sure it will fit over the old Ford hub. When asking questions like this it is always a good idea to explain specifically what you have and what you are specifically trying to achieve. Pictures are always helpful. Good luck.
How about this? Ron Part #1135BD-45 Cast Iron Hubs for Buick Drums (Pair) 5 x 4 1/2 - Pete & Jakes Hot Rod Parts (peteandjakes.com)
It is tough to re-drill 40 hubs. The studs are fitted in raised bosses and the rest of the flange is not really suited to redrilling. You would be better using 42-48 hubs. They are flat on the back.
One problem I have had here is finding someone to press in the studs. This was just for a "plain" 65 F100. This was just for pressing in new studs. All the machine shops said.... "We don't do that." The early V8 studs were pressed on and they also held the drake drum on. The studs will have to be cut from the brake drum. More accurately, the knurl from the stud will have to be cut away to free the drum and then the stud pressed out. Some use a little hole saw. If this is not done right, the drum and hub can be ruined.
One issue with ‘42-‘48 hubs is finding them with serviceable drums. My understanding is the drums are not reproduced anymore. But 40/41 still are/were. I could very well be wrong, but a few years back I asked about it on the FordBarn.
WHEEL ADAPTORS I want to run Ford wheels with a 5 X 4 1/2 bolt pattern on the front of my 40 Ford coupe using the original drums. Who makes adapters for this application? Thanks everybody! Hello, For all of your searching, those Ford wheels must be some kind of gold or lost jewelry. If you are trying to match the bolt pattern from the rear axle, then get those fronts redrilled and have new threads. You did not include a photo of the wheels you intend to run. But, those wheels should be worth the effort that you are creating for yourself. Matching bolt patterns always makes life easier. But, you have to have someone who knows their stuff, do the work. Balancing, alignment and being true are important things to consider. When I had our 58 Impala and it had as much modifications that I was going to do to it. The custom wheels were the last step in creating something different, fast, and classy. Adaptors create more problems than they are worth. Easy, less cost, but not worth it. We had gone through plenty of painted rims and tire combinations. We even considered American 5 spoke Mags, but that would have broken both of our thin, bank accounts. So, in waiting until after high school, I got a set of 5 pristine Buick Skylark Wire Wheels. It was worth the wait as those wire wheels were the top of the line and would make my black 58 Impala, a nice looking, very fast street cruiser. Now, I knew I had to get the drums and axles redrilled and set up to accept Buick Skylark bolt patterns. An adaptor would not have worked as it would have moved the wide wire wheels too far outside for clearance. Jnaki So, I had a professional machine shop (Henry's Machine Works 1962) redrill the drums and match the rear axles to fit the Skylark Wire Wheels. Those wire wheels and tires easily fit in the rear wheel opening. So, the custom wheels were worth the effort to get them right. It did take some modifications to make it run true, straight, and smoothly. It was a one of a kind 58 Impala and there were no other Impalas that had the same look at the time. The Skylark Wire Wheels were getting the individual spokes aligned, tightened and the blue thread lock was applied, as well as a rubber tube sealer for each wheel. It was being done in the tire/wheel/alignment shop next door to the machine shop. (even the tires were also being given the true round shaving) When the machine shop was finished with the drums and axles, it was a simple bolt on application. Thanks, @themoose So, if anyone had my old 58 Impala that needs Buick bolt pattern wheels and a C&O Stick Hydro, that was a one of a kind modification. Send me some photos… Thanks.
I have used these sucess and a set of transfer punches Lay the template over the 5.5 studs and mark the pattern The hub keeps the brake drum centered. https://www.speedwaymotors.com/Wheel-Bolt-Pattern-Circle-Template-Gauge-Tool,5951.html?sku=91082027&utm_matchtype={match_type}&msclkid=cf001b70867013ee7f1d7a8df7a68fb1&utm_source=bing&utm_medium=cpc&utm_campaign=SMI - Shopping (CSE) (Bing)&utm_term=4577404348890847&utm_content=All Products (Feb28_2020) https://www.amazon.com/ABN-Hole-Tra...hvlocphy=&hvtargid=pla-4583863983336519&psc=1
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