General Category > Quadrajet Carb Talk and Tips
carb questions
old blue 75:
That carb was rebuilt about 12 to 15 years ago with a parts store kit and has been on my truck ever since. It's been parked for the last 5 years for a body rebuild.
I have a 7045214 carb available to use that has the same linkage set up.
I will have to see if it is missing any parts.
Cliff Ruggles:
Overall it will be a better choice having provisions for PCV, vacuum advance, and vacuum for accessories, etc.
No mention of what engine or what has been done to it?.......
old blue 75:
Engine 355 sbc flat top pistons, 441 heads 1.94/1.50 valves bowl blend, crane hr-260-2-12
hyd. roller cam (lift .429 I .452 E dur 260 270 dur @.050 204 214 112 lca), stock gm gjet intake
(aluminum version egr removed) 1 5/8" headers, hei dist.
It is in a 1986 short box chevy 4x4, 700r4 trans. crappy 3.08 gears, stock 235/75/15 tires.
Cliff Ruggles:
Nice engine build, should work very well for what you are doing. I actually had a near identical engine in one of my 1970 GMC pick-up trucks decades ago. 441 heads, .020" shim head gaskets, flat top pistons .015" in the holes at TDC, Crane 288 Blazer camshaft, 1.6 ratio rockers, stock iron intake, factory Q-jet. It was backed by a TH350 and Dana 60 with 4.10 gears. I ran that truck for many years and it was pretty impressive for towing and pretty darned quick on the street for what it was.
441 heads are at the top of the pile for the 1970 and later large chamber SBC offerings. They still had the good ports left over from the good 1960's heads but used a larger combustion chamber for lower compression/emissions. That head is actually quite a "sleeper" as the larger chambers unshrouded the valves a bit for good breathing. They were actually quite sought after and still are for some circle track racing classes that require a "stock" iron head but larger combustion chamber.
3.08 gears actually do pretty good with a 700R4 as it has a pretty tall first gear.
What are you doing for a choke? The later EGR intakes were either hot-air or electric, none were set up for divorced choke carburetors that I know of......
old blue 75:
Thanks for the compliments on the engine build.
I too used a .020 shim gasket but my pistons were a little farther in the hole.
I ended up at .044 piston to deck. I would have liked .038-.040 but was not
worth another deck job.
I had the same thinking on the 441 head plus the fact it is one of the heavy castings not the thin 77 and later crack prone castings. I also had hardened seats put in for reliability.
After your comment on the choke I went out and looked.
I have casting number 14007378. It must be a hot air intake.
https://cimg7.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/2000x1504/img_0219_6d2241e78a83913d6d06f1b21937ee395b4c9416.jpg
I made a mount out of aluminum for the choke thermostats spring and made linkage to work.
Even in 0 deg. weather it seemed to work fine.
Does it sound like the 7045214 carb will work ok. I know it is the older version with less available parts selection.
Thanks for the input.
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