HEI or Mallory HyFire? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

e rock · 05-04-2007, 07:25 PM

I'm in the middle of swapping the 350 out of my 71 K20. It was already running HEI, so keeping that setup seems like it would be easiest.

The motor that's going in already has some kind of *bling* Mallory dizzy, Promaster coil, and a separate box that controls variable advance curves or something like that? This is also a 350, but with a decked block and lots of $$ into port-matching and head polishing and balancing and whatnot.

My inclination is to keep it simple with the HEI if the power difference is negligible, but I don't want to waste potential by going cheap... I like the fact that it would still run off-the-shelf parts as well.

Which would you run and why?

05-04-2007, 07:25 PM	#1
e rock Registered User Join Date: Nov 2006 Location: Monroe, WA Posts: 87	HEI or Mallory HyFire? I'm in the middle of swapping the 350 out of my 71 K20. It was already running HEI, so keeping that setup seems like it would be easiest. The motor that's going in already has some kind of bling Mallory dizzy, Promaster coil, and a separate box that controls variable advance curves or something like that? This is also a 350, but with a decked block and lots of $$ into port-matching and head polishing and balancing and whatnot. My inclination is to keep it simple with the HEI if the power difference is negligible, but I don't want to waste potential by going cheap... I like the fact that it would still run off-the-shelf parts as well. Which would you run and why?



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