the 2 barrel carbs Tom Langdon sells are very small 2 barrels, as they were originally for a small (I want to say 96 cubic inch engine) thats is why you need 2 of them. I have heard nothing but good about the setup, the only negative comment I have heard is, if you like tinkering with things endlessly. These will be disappointing, as all you do is put them on and run. Unlike Bart Bosco, which has had lots of trouble with the carters. Which is just about standard for the original style carburetors, so if you don't chose to go with the proven, tried and true setup from Tom Langdon (who by the way used to be one of the GOOD engineers at GM). At least get some bungs welded up into your exhaust so while you are pulling your hair out trying to get them to run you can use an O2 sensor and get some real life information. Or you could use the clifford 4 barrel intake with the small 390 cfm 4 barrel and their exhaust, although they say it will fit with fenton headers, the fella said you would need to do some grinding to fit. If I had known about that I would have probably got that instead of the two 2 barrels, but they will work just fine. (I just haven't installed them yet) One more small bit of advice, if this is a first time firing of the engine, use the original carb set up if you know it runs, as you don't need to be trying to sort out carb problems as well as whatever else you will run into. (which is why I haven't installed MY dual 2 barrels yet, besides the fact I want to polish the intake up) Also this is very, very important, read up on cam break-in procedures. Go to any of the major cam manufacturers websites they all have pretty much the same information. (or 2 or 3 websites) So far I have seen 3 people NOT follow the procedures and we still don't know how it turned out for them as they never returned. I'm pretty sure they are too embarassed to admit they just trashed their engine because they can't or won't read directions. I will say this although it is in every procedure I have read, make sure you have everything set up before you install the lifters and pushrods, you only need to turn the engine 1 single solitary revolution to set the valve lash. Make sure your ignition is set correctly, carb is full of fuel, as you want it to fire within the first 3 or 4 revolutions, that fancy cam lube you just used is gone the first turn. Anything after that is on the microscopic level. Don't crank your engine to "prime the oil pump" use the priming tool as described in tech tips and about every other post on this forum. And if you have paid attention upon assembly you will notice there is no actual oil passages to the cam lobes themselves, their main source of lubrication is from the oil flinging from the crankshaft, which is why you immediately bring the rpms up to 2500 rpm.
Last edited by brokenhead; 02/26/2013 5:59 AM.
