I finally got my magnum heads/new cam broken in on my '84 318 (thanks for the help btw) but I'm running lean. Anyone re-jetted the Holley 2280 or know what the stock jets are? I think that where the problem is anyway...

No vacuum leaks I can find. Timing is about 12° BTDC if the rubber hasnt slipped.

 

If your talking about the dinky factory 2bbl, noboby I know of makes jets/pins for 'em. Drilling out the jets is one way, reducing the air bleeds is the other.The air bleeds are tricky to calibrate though.
Either way it's trial and error. I saw a Super Stock 273 racer in a magazine with the factory 2bbl BDS. Seems like The Carb Shop done his.I thinkthey drilled it for Holley jets,among other things. The little 273 was crankin 13s in a wagon if I remember right.
A factoryQuadrajet set up would be legal,and run better to boot. Don't much like the Thermoquads myself.

 

Bah I thought for sure Holley would have some parts to swap in.

I havent been able to find a used iron 4bbl intake anywhere and a new Edelbrock is $220 so I'm trying to put a few miles on the current setup and make sure nothing goes catastrophically wrong before I put more money in it. I'll eventually get a 4bbl on there though.

 

Glad to see you got it fired up. Sound pretty sweet?

 

i hate dealing with carbs probably because that is an area im not experienced in...i rebuilt mine to find out later i couldve replaced it for 50 bucks more..here is a link that may help ya find more info on your carb.....good luck.
http://www.guaranteedcarbs.com/index.html

 

It doesnt sound much different than it did before; same carb, intake, exhaust, etc. Lopes a bit more at idle. Throttle response feels better than it did. Needs more carb/intake though I'm sure of it and dual exhaust whenever I have the spare change.

I rebuilt mine a few months ago before doing any head/cam work. Unless I forgot a check ball or something it should be good as new. Nice link though.

I've been looking around online for some used 4bbl parts. If I can grab a thermoquad & intake for around $100 I might just do it. I'm kinda scared of used plastic bodied carbs though. What model/year used Q-jets? (Edit) nvm, Looks like 85-88

 

How'd you mate the stock intake to the magnum heads? Or didyou?

 

arg. you made the la to magnum conversion w/o putting together a little FAQ with pictures? any one of us would love to see some shots of how that all goes together

 

I made a jig similar to the one found here: http://www.bigblockranger.com/Jig.html
Cost me about $20 in materials including the drill bit & tap. Worked great.

I had considered it but I got lazy. It really is a simple, straight-forward swap though. The only real "mods" I did were the LA intake bolt holes and filing some casting flash around the pushrods. Everything else was bolt-up. The whole project so far cost under $600 including oil, filters, lubes, jig, files, engine paint, gaskets, spark plugs, cam & lifters, pushrods, headbolts, heads w/ cleaning & surfacing & checking, double roller timing set, and shipping costs. More to come, but it hasn't shredded my wallet just yet.

 

Pretty cool. I never was a big fan of the Thermo-wad carbs either. When they're right,they're right,if not they can be a pain. The Q-jet was alot more dependable. If you can't locate a Mopar Q-jet maybe get a 305/350 Chevy,or a 307/350 Olds, and a junk T-quad. Grind the bradding off the end of the shaft
that holds the T-quad throttle lever to the shaft,and install it on the Q-jet by tack welding it. Gives you the Mopar kick down etc. I've done this before.
You still have to deal with the 2bbl/4bbl linkage differences etc, but it works OK.I'm not sure about choke well/linkage clearance with the Q-jet,been 15 yrs since I did this.
[They say poor folks have poor ways,and I'm damn sure poor]