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OBS 97 Z71 05 5.3 and Radix Swap

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Old 01-25-2010, 07:21 PM
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lol, yeah there is a mp112 for my friend's Avalanche here too. it will be going on next month. That build will be here too.
Old 01-25-2010, 07:32 PM
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Sweet!! nice paint job man! keep up the good work.
Old 01-25-2010, 10:02 PM
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Thanks a lot...more to follow tomorrow.
Old 01-25-2010, 11:33 PM
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nice paint job. this is gonna look good in any engine bay
Old 01-26-2010, 08:40 AM
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Originally Posted by turboescalade
nice paint job. this is gonna look good in any engine bay
x2 i wish it was in my engine bay!
Old 01-26-2010, 02:09 PM
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Thanks a lot guys. Took a lot of cleaning and prep, but I think it payed off well.

I worked on it again today for a bit...got the final assembly done on the heads, installed the S&P mount plates, and an adapter for the temp sender.

Pulled off the masking

Installed the new MLS Head gaskets

Along with the hardened ARP head bolts

Comp hardened pushrods

compared to stock

S&P mount plates

They did not fit right...had to clearance the front corner of the plates on both sides in the same spot.


The plates installed


The adapter fitting for the old style temp sender so I can retain my stock gauges
Old 01-26-2010, 02:20 PM
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Looking good.

Good to know about the s&p plates. I have the same ones which I am going to use for my swap.

Also you could have also used a multi-element temp sensor from a 98 camaro (I believe) that has two outputs, one for the pcm and one for the gauge. Just makes it a little cleaner looking.

Multi-Element Coolant Temp Sensor
Part# 12551708

Connector part# 12102748
A = black(gray 6.0)............coolant temp input to ecm, low reference
b = yellow...........coolant temp input to ecm, sensor signal
c = green............coolant temp input for cluster mounted temp gauge

Last edited by Whippled2dr; 01-26-2010 at 03:03 PM.
Old 01-26-2010, 02:33 PM
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well, I wanted to retain both the temp and the oil senders that are on the stock engine in the 97 350. The threads on the ls motors are metric, and the ones on the older lt style is standard.
Old 01-26-2010, 02:34 PM
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Thanks for the compliments BTW.
Old 01-26-2010, 02:36 PM
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ended up using a flat file by hand, and it only took a min or two to get the job done...wanted to do it by hand so i could minimize the amount of material I took off. Worked out well.


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