Lol it was the biggest and first alternator I pulled off my shelf. I trusted it only because it said "SUNFIRE GOOD" on a piece of duct tape to it.
It also had the SBC small stepped bracket that bolts to the .. waterpump? Mine was bent and had a washer shimming it and this one had it good, it also had the spacerfor the head bolt on it already bolted to the back vs I just didnt want to reuse the one Since it my have had issues. I stole the adjuster plate from my 305 because it was bent and the track was swiss on the one I had too.
The pic was during work and a more recent pic is this
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Notice I have no shroud lol... ever since I put the 7 blade fan I actually am not able to overheat my engine without a shroud or an overflow, but that would be different if I was doing something with it, it made it nice since the radiator going in and top plate will allow me to use 1 piece shroud\
also I know I have more issues also present here lol but works is ok for now. However on your comment, the dual belt pulley. I decided I wanted to use it at first to drive the pulley with 2 belts or just try and future do that, since the right number of slots on the pullies and the components could, theoretically, allow both a PS pump and a alternator to be driven by two identical belts , that includes the water pump, however the alternator dual belt pullies are special compared to the dual ps pullies I have but there are dual PS pullies that are like this too. If you noticed, the distance between each belt is different. Thats not weird on its face, but my ps belt is not like that(belt rather) and what I found is that on some SBC/SBO/SBP/SBB/maybe cadillac/probably big blocks too is that when an alternator and a ac compressor are on the same side, the alternator is usally not used as an idler to the compressor but the 2nd groove is either close to the belts path or conceivably in the adjustments of belts/components, a alt/ac could be the distance where the belt
would be in the path
I have limited research about smog pumps since I do not own one on my small blocks except my engines that dont run in the grass sadly, maybe for my own good, idk. Anyway, the belts to them seem to be either run directly off an adapter to the crank or wp or they are in the fun mix with an alternator but the alternator is then sized to match that air pump and crank pulley diameter and would be slow turning on any normal setup like, my truck with a normal like pully sizes and no air pump.. anyway.. the idea is that the pullies with dual slots for the final accessories are different beasts. And in the case of this pic
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you can see the belt is to the alternator of course. same concept to the ac. That ps pulley, by design, has endplay, belts get warm, belts wear and stretch, and all in all, I wouldnt want the alternator belts cords glazed/cut by the ps pump lol!
I think the AC systems using the passenger side for PS and AC that I have seen like to drive the AC with 1 belt that passes close to the ps pump if not outright rides in the groove and the ps pump is turned by a quite well wrapped belt on the crank, wp, ps. This combo may be to allow the belt to not be tightly wrapped by the AC but to minimize the slipp because the PS pump is also driving it partially and that also acts as a bottom pulley which changes the direction the force pulling the belt comes from
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Here I found a good photo of what I mean
That is a big block ofc but the ps below it has 2 belts and i presume that since its using crank and ps and ac the belt type is normal with ps pump idler in involved, since the PS Pump is then driven crank wp ps.
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this is my electra. not visible to the left is the AC comp. a belt go to it and the alternator has 1 that goes to it, but in the space between the groove and the alternator is what kinda looks like a groove but its just rather a void where I assume deflection and stuff can take place and not hit that one, but that belt that runs the AC is larger. But if you had no context it almost looks like the alt has 2 different belt grooves.
Fun stuff!!!!!!!
This is the stuff I live for, help me
just a couple small things and I will be back to how 1980 my engine would have looked.. maybe..
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