Friendly? Darn, I thought the F stood for something else (especially since I always saw it used in frustration before)
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I have no experience with that particular brand, I bought one like it for my 302 Ford project (yeah V thingy, I know) and the distributor itself was fine. I put an MSD module in it (for the built in rev limiter) and it worked flawlessly, even with no hood at 65+MPH in the driving rain (Dizzy's in the front on the ford too).
Now the down side most (I would guess all) of these are made to use as much of the stock HEI as possible (so at least you can buy service parts anywhere, right? read on). So what they all seem to do is use a housing cast to fit the application (in this case chevy 6 lower and 6cyl HEI top) with a two piece distributor shaft (stock HEI top and trigger wheel / advance mechanism with an application specific lower piece). This may not be a problem depending on how the two pieces of the shaft are held together. The Pertonics, and Proform distributors (from the pictures) use an extended lock collar (in my Ford example) to support the joint and a stock appearing dist gear. Mine on the other hand uses a stock appearing colar and a non standard gear.
Earlier this year the engine in question got a bad batch of fuel in Cali and amongst other things I lost the cam (water in the oil and a HV oil pump wiped most of the Dist gear off the cam). So when I went to get a replacement gear could I find anyone that could sell me one that would work for mine? No, so I bought MSD, at least I'll know where I can get service parts.
I guess the morral of this story is look very carefully, if you know what it's supposed to look like (in minute detail) and it actually looks appropriate, go for it. If it weren't for having a questionable gear on it I would be running it now (custom retro roller SBF cams from Comp run $500+ so I'm not gonna chance it on a gear that has already seen a cam gear fail) but then I wouldn't know a Chevy inline 6 dist gear if it bit me.