Thread: 8-71 blown 390

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Originally Posted by jerry clayton

there were a couple places that used to make blower manifolds out of carb type manifolds--it entailed cutting away every thing except the area around the ports and weld a structure together that was very much like the true blower manifolds and it let many people put 6-71 type blowers on some ngines that Cragar,etc didn't make manifolds for-----I don't remember for sure but it might of been Gary Dyer near Chicago-----yeh---he makes rods now

Jerry, there were people running 671's and 871's on a 1" thick aluminum plate bolted to a single or dual 4 barrel intake right where the carbs would bolt on. They usually have 4 thick pieces of aluminum welded to the corners of the manifold to bolt the plate to for support. Is it optimal? No, but it will work. There is a guy in Wahoo Nebraska that builds 871s and 671s and he is very familiar with these. I had him make me a plate to bolt on to a 7.3 IDI diesel. I stuck a 671 on it. It worked pretty slick. I also had one of these setups for a SBC but sold it.

But I agree with these guys, if you can buy an actual blower intake, do it. The blower will flow more air and will just be better over all. If you want to go back from a blower to NA, you'll have to swap cams too more than likely as well.