I ran the UR4 this time to fire up the motor. 4 pumps of the Holley waited 10 seconds turned the key and fired within 1 second. I run the YR5 for the nitrous and have run this plug on street and it ran fine stayed clean. you may want to try this plug after you get everything squared away. This plug is not extended like the UR4 so will not be as hot. UR4 is hotter than UR5 opposite of the AC Delco plug. R43 there or R44 or R44t R45t or R43tsx R45TSX those are the .060 gap plugs. Here are the YR5 plug I use for nitrous, it stays clean as long as you are out driving but if you just pull out of garage and let it idle and just run in driveway and then put away they start to blacken up some probably from valve guides leaking some and it just does not get cleaned off unless you can drive but these plugs work fine in the 350.
She’s in, I always HATED R&I’ing this engine, yes it’s a small block cubic inch wise, but it reminds me of big block Mopars, dimensionally it’s a big block to me, much wider than the SBC
Thank you! Steve does an awesome job! That sensor for oil temp is actually not going to do anything except plug the hole I found it in my stash of “gauge stuff” and it fit, probably gonna put a pipe plug in there eventually sometime probably never will
