Hey Pal,
These are two well proven intakes from the 70's, there is awesome stuff out there today so what are you building. We did a bunch of the pre release Dyno testing on actual race motors with the Streetmaster there, which won a lot of races.
If you do not want to buy a book, all of the Intake manufacturers will be glad to take your call and discuss your combo and their dyno development or who is winning what with it. And the FE guys here are a wealth of knowledge.
Sounds like you may have a good deal on two vintage pieces? And are on a budget?
The relevant question is, what engine is this going on? What do you plan to do with it? What gears, weight,trans and all please?
Some people take one engine, like a stock 428, and run a bunch of intakes on it but you should tailor the intake to the actual BMEP of the combination, and environment, and intended use or track/class/goal.
As for ease of installation, the Edelbrock was based upon performance 390's and has small high velocity ports that fit low riser heads, but you cannot torque about 4 of the bolts. You need a header bolt here, and an allen cap screw there, so you have to learn the feel of getting all 10 bolts even. Some under torque them. You can calibrate the exposed hex bolts for 'turns' as you torque them, and this helps gauge the non torqueable guys. Finger tinght for all, 10 lbs equals x of a turn, duplicate on the header bolts, then 25....I am sure that you get it. You do not need the stretch to yield dial degree torque stuff for later cars, but this is a similar deal. They make good power on many engines.
Also, both intakes have that retro, old school look of a part from back when. This can add to the cool factor and fit the look of your car.
If these 2 intakes are yours, or the target, check to see if anybody milled them? And also that they are flat on the gasket flanges.
The Holley can be torqued traditionally.
Have fun and good luck !
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