Recent content by ZMAN24250

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Selling new in box PRW stainless roller rockers and Edelbrock guide plates. Bought Hughes kit 1550 stainless rocker kit for my Magnum head LA build but by the time I got around to assembling the engine, I decided to not use 1.65 rockers and opted for buying separate 1.5 rockers and guide plates...

Sent you a PM

Is the midland booster still available?

Measure the deck surface to the bolt holes. That will tell you if the holes are wrong. You can find measurements of LA heads earlier in this thread.

Finally got my block back from the machine shop and mocked everything up. Everything looks as it should with port placement with these "good" Promaxx heads. The ceiling of the port is basically line-to-line with the intake on the two ports I could barely see. I can barely get in there with my...

What video are you talking about? Id like to take a look.

I thought about this... First off, it's not the intake bolt holes that are wrong, the port is just purely in the wrong spot. So only thing I could think of is make your own gasket, and port an intake specifically for those heads. Or you could try welding/adding epoxy or some equivalent to the...

So, some quick visual identifications we found to tell what seems to be the good casting from the bad (aside from the port/gasket misalignment) are shown below. Overall the casting seems to have a much duller finish and is closer to cast iron gray. The other heads seemed to be more glossy black...

More updates. Took the NFG head back to summit store to exchange. Laid out what was wrong and showed them the good head, and they agreed there is a quality issue. After looking through the first few boxes and finding junk castings, they eventually brought down their entire stock and went...

I bought my engine quest heads from the Las Vagas facility through their ebay store. The Promaxx heads I bought directly through summit racing. Seems like most of these places get their castings from the same place. So just check over whichever you get. Like I mentioned, I got two promaxx...

Edit: It seems summit racing has acknowledged this quality issue and may be fixing it with the supplier. So this may or may not be mended. But still buyer be ware. WARNING. PROMAXX heads may be susceptible to this same sh*tty casting! Buyer beware. Scrutinize ANY/ALL aftermarket replacement...

$300 OBO plus the ride if shipping. Located in NE ohio. ICON IC744-030 pistons for a stroker 408 build. (see link) Flat tops with 5cc valve relief dish. These will get you about 11.8:1 with a 64cc head. Have only like 5-8000 miles on these pistons. I'm changing my build up and going to dish...

The promaxx heads seem to be checking out for me so far. Spent about 10 hours this weekend on one head and i havent seen anything super bad yet.. though I cc'd the chambers and they came out to 67cc after I massaged them a little.... that's a bit more than I was hoping but c'est la vie...