This is what I did on my 1955 Patrician:

http://1956packardpanther.com/Panther/powerbrakes.html

This is what I did on my 1956 Panther:

http://1956packardpanther.com/Panther/booster.html

Craig

I luv "orphan" cruise nights. One usually sees interesting, not often seen makes. I've taken my 55 Pat to several over the last twenty years. Thanks, Kev for taking your '54.

Craig

It's been a while since I've had my 4GC apart, but IIRC it's like most carbs of the era,i.e., there's a well under the accel pump seat that is sealed with a pressed-in & staked plug. Drill out the plug and punch out the accel pump ball from below. If the seat is deformed, they a bigger OD ball is called for (there are specialty carb shops that have 'em). When done, seal the old well plug with an aftermarket (same shops as above) screw/press-in plug. Problem solved.

Craig

P.S. The accel pump probably still "worked" because it can get fuel from the float chamber IIRC through both a slot and pin hole.

Good advise by both BigKev and Howard (HH56). On my 55 Pat, I have an aux electric fuel pump under the D-side door on the frame with a small fuel filter before it (like you). Otherwise, everything is stock including NO filter between the mech pump and the carb except for the stock glass bowl ceramic one. I've driven it like this for at least 10 years, maybe more, with nary a problem sometimes in 115F Summer heat stop & go traffic which will show up a fuel delivery problem if anything will.

Craig

Your 55 Pat looks almost identical to mine, so obviously I think it is a beautiful car. The mechanical problems are readily solvable.

BTW, "pull to the right" by the brakes has zero to do with the BTV per se. More likely, a leaking right front wheel cylinder causing the brakes on that side to have less friction.

See my website for more upgrades I did on my 55 Pat:

http://1956packardpanther.com/Panther/special.html

http://1956packardpanther.com/Panther/myPatrician.html

Craig

BTV can be a potentially fatal failure point. Many have reported success by having them rebuilt by a reputable source. I went another route, shown here on my website for your edification:

http://1956packardpanther.com/Panther/powerbrakes.html

17 years of no problems with this conversion.

Craig

Maybe 15 years ago, I experienced exhaust valve seat "recession" on my 55 Pat due to the use of unleaded gas on a couple of long trips. I pulled the heads (no easy feat) and had the exhaust valve seats fitted with hardened seats. That solved it and I haven't had a problem since.

Craig

A couple of points of reference given that I did almost all the restoration parts procurement and work myself on my 1956 Packard Panther "restomod custom":

Paint was $5,000 and the shop was local which did mostly collision repair for an established dealer. They did minor finish (perfection) work on the body which turned out beautiful. It helped that the manager was a restomod guy himself and like was suggested above, I made myself known at the shop and met the guys actually doing the work.

Engine work was $1,000 which consisted almost entirely of checking previous engine work and making minor accuracy corrections. I assembled it myself. The owner of the shop also took an interest in my project and even came over to my garage a couple of times to see the progress.

YMMV,

Craig

Another (USA) source is Trans-Dapt Performance Carburetor Adapter #2064 available from SummitRacing.com

Craig

Simple, this one:

https://revsinstitute.org/the-collection/1933-packard-twelve-sport-phaeton/

Pros: V-12, over 100mph, chicks dig it.
Cons: none that I am aware of.

Craig