Restoring Rusty

[Gregski]

and here it is all "converted" to a 4150 using the Holley Kit Part Number 34-6SA

if there is one thing I love about Holley is their very super simple part numbers

the kit just comes with a secondary metering block and a longer straw aka transfer tube and some hardware ok and new gaskets

the metering block is super lame, the idle mixture holes are there but are not threaded nor drilled all the way through, so you do not end up with what they call a 4 corner idle

the block also does not have an opening for a power valve nor pre drilled holes for a secondary accelerator pump, but that's ok, this is not a double pumper

[Gregski]

so since you didn't ask I'll share anyways

a plate is like saying something is hard coded, ie it is not adjustable, you want to change the way the secondary circuit flows you gotta buy a whole new plate with different termite tunnels in it

a block on the other hand is adjustable though not all blocks are created equal, in this one for example the only thing I can adjust or replace are the jets, but hey that's better than nothing

A company called Quick Fuel Technologies does it right they make Holley like carbs with metering blocks that you can adjust everything on, emulsion tubes, idle jets, power valve restriction channels, say what? yeah you heard me

here we stare and compare a secondary metering plate to a secondary metering block

[Gregski]

alright so now we are cooking with Propane! ha ha

but we want more...

we want new center hung float bowls with sight glasses for adjusting float levels cause that remove a side bolt and watch fuel poor out on to the hot engine block aint no fun

[Gregski]

but of course the new float bowls come plane Jane naket so now we need to source new center hung floats and their hanger hardware and we also need new DUAL inlet hard fuel line to replace that pesky transfer tube

[Gregski]

so nothing to it but to do it

so yeah the old 4160 came with side hung floats (who knew there was different kind am I right fellers?) now not all 4160 carbs come with side hung floats, some do come with center hung, all that 4160 means is one block and one plate but we already pounded that horse to death

so yeah the floats aint transferable (kinda like my junior college recreation and leisure class, ha ha - I'm looking at you American River College)

[Gregski]

and yeah the 200 lbs Gorilla did break the Accelerator Pump Umbrella Check Valve whilst trying to transfer the Accelerator Pump from the old float bowl to the new one - I mean sometimes I don't know my own strength

(yes I did just use the word "whilst" it's a lost art I tell yeah)

[Gregski]

so went to the local Hot Rod Shop to pick up one $10 dollar replacement part and came home with this

this ever happen to you fellers?

[Gregski]

alright got the new Umbrella Check Valve installed and got the Accelerator Pump transferred

[Gregski]

and got my new 4150 carb all buttoned up, looks more and more like the real deal now don't it?

nothing against Edelbrock but Holley is just a sexier carb in my opinion

[Gregski]

KOOGLIE MOOGLIE

just when I thought we were out of the woods the darn new dual hard fuel line fittings don't fit, they are way too small, the holes in the float bowls appear to be huge like 7/8ths and these fittings are like 5/8ths

it ain't easy fellers, it aint easy

[Hewfil1]

Gregski, is it a 4160 or a 4150? You mentioned 4160, then later 4150. I'd like to know as I might decide to go with this rather than the $400 Edelbrock I was looking at. As I also have a 1974 GMC with 350ci V8.

[Gregski]

Originally Posted by Hewfil1

Gregski, is it a 4160 or a 4150? You mentioned 4160, then later 4150. I'd like to know as I might decide to go with this rather than the $400 Edelbrock I was looking at. As I also have a 1974 GMC with 350ci V8.

I bought it as a Classsic Holley 4160 Part# 0-80457SA 600 CFM but I converted it to a 4150 using their kit.

If I had to do it all over again I would have bought the 4150 model Part# 0-80783C also a Classic Holley.

both have vacuum secondaries

both have electric chokes

but the 80783 already comes with the center hung float bowls with the dual inlet, the only thing it lacks is the sight glass in the fuel bowls, and it is made of heavy Zinc instead of light Aluminum, but still a better carb

if price is a deciding factor look for these on eBay sold by Holley Performance as referbished you can get them for under $300 and they are done by the Holley guys / factory (dang it I just gave away my secret)

here's a pic of the better 80783 4150 style carb

[Hewfil1]

Originally Posted by Gregski

I bought it as a Classsic Holley 4160 Part# 0-80457SA 600 CFM but I converted it to a 4150 using their kit.

If I had to do it all over again I would have bought the 4150 model Part# 0-80783C also a Classic Holley.

both have vacuum secondaries

both have electric chokes

but the 80783 already comes with the center hung float bowls with the dual inlet, the only thing it lacks is the sight glass in the fuel bowls, and it is made of heavy Zinc instead of light Aluminum, but still a better carb

if price is a deciding factor look for these on eBay sold by Holley Performance as referbished you can get them for under $300 and they are done by the Holley guys / factory (dang it I just gave away my secret)

here's a pic of the better 80783 4150 style carb

Would you be willing to send me the entire parts list in a PM? Or in the thread. Or just go with the 4150 over the kit? My choice right now is between this and the Edelbrock 14063 (noNEGR)

[Gregski]

Originally Posted by Hewfil1

Would you be willing to send me the entire parts list in a PM? Or in the thread. Or just go with the 4150 over the kit? My choice right now is between this and the Edelbrock 14063 (noNEGR)

PM sent

[Gregski]

*** Added a TABLE OF CONTENTS to the very first post with the Thread Numbers. ***

[Gregski]

just another reason to convert from the 4160 style carb to the 4150, this transfer tube that connects the fuel bowls is a PIA when changing jets or power valves and the rubber gaskets rip and tear

[Gregski]

carb parts

Holley Quickchange Vacuum Secondary Housing Cover

Cover-Diaphragm Housing 1 x 4 bbl
Part# 20-59

[Gregski]

more carb parts

Holley Secondary Diaphragm Spring Kit
Part# 20-13

[Gregski]

so my carb came with a spec sheet, which was wrong by the way, it said it came with the Purple vacuum secondary spring, well it didn't it had the plain one

moral of the story gentlemen, please check what you have installed don't trust no written word, ha ha

Introducing the starting line up (from left to right, lightest to heaviest)

Snow White, Short Yeller, Tall Yeller, Purple Rain, Plain Jane, Too Tall Brown, and Back in Black

[Gregski]

so we remove the appendage and remove the cap / lid

first we gotta remove the electric choke housing and slide that out of the way, PIA, the Greg does not like dependencies and prefers a nice isolated stand alone modular setup, in other words why does the electric choke have to block/hang off the vacuum pod

[Gregski]

mandatory stare and compare

[Gregski]

now we thought we were too cool for school and that we could git er done on the carb on the truck, but turns out that rubber plunger/diaphraghm is so pesky that we decided to remove the entire vacuum pod and put the new lid on it on the work bench

[Gregski]

and here it be in all its glory back on the carb back on the truck

be super careful with that microscopic clip washer that holds the push rod on the cam lever thingie it is practically invisible to the human eye, lol

and my God this is the best single investment you can make to your Holley carb, it takes a 20 minute job (replacing springs) and cuts it down to 2 minutes (that includes chugging a beer) ha ha

[Wide Open]

Nice work.
Posted via Mobile Device

[Hewfil1]

Can't wait to see how she's running with the new parts.