That's good to know! I'm really picking your brain here but would you know if the fenders on a 1978 would work for a 1979? I've seen both yes and no so I figure I would have to ask someone here.
And on a random note I found a 350 turbo transmission for cheap that i'm going to throw in.

 

Yes, the cutoff is '77 or earlier. 1978-81 same fenders.

 

if you have long tube headers you may have to lift the engine out to put them on, the drivers side is a tight fit. and on my 79 the build sheet was under the front seat most of the time there long gone but if its there be very careful removing it and i would frame it. i agree holley is a great carb i stand by them and highly recomend, but holleys do need maintenance . everyone has there own opinion i think a 350 should have a 750cfm and i do not like vacume secondairies, this depends on how your engines put together if you have a high lift cam with good flowing heads i would use a 750 holley double pumper,but if your looking for a easy way out the edelbrock carb is the best way to go. its perfect for a mild 350 and its easy to tune.i hope no one gets ofended by this post its just my opinion. good luck

 

I'm sure not offended, but I sure wouldn't go that route from my experience with all those carbs and situations.
I'm running a 750 cfm Holley with vacuum secondaries on my 427 in my '71 Camaro, and it's plenty of carb. I ran a Edelbrock 750 Performer on it for almost 10 yrs, and never could get it to run worth a darn. Even bought the performance tune kit from Edelbrock, and no luck getting it to really make my engine breathe.
The double pumper works well, but only because the extra accelerator pump makes up for the huge influx of air when the engine hasn't developed enough vacuum or rpm's at off idle when you mash the throttle. A vacuum secondary carb wont open and give your engine that extra air until the engine actually has enough vacuum to demand it. They're way better at off idle response, and still perform almost as well at high rpm's. They also get much better gas mileage than a double pumper.
Out of all of them that I've used on my 427 the vacuum sec. 750 has been the best in the 1/4 mile, and also the best for daily drivers. Maybe if your SBC is really extremely well built would I reccommend a 750, and even a double pumper 750 if it was really built and you were doing mostly racing with a manual tranny.