roscoe69 Posted April 25, 2011 Share Posted April 25, 2011 Hello everyone, I've just acquired a B-421 with the 402 flathead in it and was wondering if anyone had some part numbers or where the best place to locate points and plugs for this engine. Info seems to be pretty scarce.Thanks !!!Ross Quote Link to comment https://www.bigmacktrucks.com/topic/18838-points-and-plug-part-s/ Share on other sites More sharing options...
roscoe69 Posted April 25, 2011 Author Share Posted April 25, 2011 dang! I must have one of a kind! Quote Link to comment https://www.bigmacktrucks.com/topic/18838-points-and-plug-part-s/#findComment-76660 Share on other sites More sharing options...
Greg Rider Posted April 25, 2011 Share Posted April 25, 2011 Find the number on the distributor tag. Take that to an old NAPA and they can find it for you. My 330 flathead has a Delco unit and is easy to get things for, I can even get an electronic conversion if I want. I would see if they can look it up just with the year and engine size first. If they try to use the computer, politely say that it is probably in the old Echlin book. Quote #1 on A-model registryIf I drink because of work, why can't I drink at work? Link to comment https://www.bigmacktrucks.com/topic/18838-points-and-plug-part-s/#findComment-76662 Share on other sites More sharing options...
roscoe69 Posted April 26, 2011 Author Share Posted April 26, 2011 Thanks for the reply! Any idea what would be a good spark plug to try in it? it has RJ19YLM lawnmower plugs in it now.Ross Quote Link to comment https://www.bigmacktrucks.com/topic/18838-points-and-plug-part-s/#findComment-76666 Share on other sites More sharing options...
Firemack Posted April 26, 2011 Share Posted April 26, 2011 Roscoe,Here is the tuneup spec sheet, once you get the parts it has all of your tune up info.Firemack Quote Link to comment https://www.bigmacktrucks.com/topic/18838-points-and-plug-part-s/#findComment-76669 Share on other sites More sharing options...
Rob Posted April 26, 2011 Share Posted April 26, 2011 I run either CJ8, or straight J8 Champion plugs in mine.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/18838-points-and-plug-part-s/#findComment-76674 Share on other sites More sharing options...
roscoe69 Posted April 26, 2011 Author Share Posted April 26, 2011 Thanks for everything!! this will get me started anyway.Ross Quote Link to comment https://www.bigmacktrucks.com/topic/18838-points-and-plug-part-s/#findComment-76678 Share on other sites More sharing options...
Maddog13407 Posted April 26, 2011 Share Posted April 26, 2011 J8C Champions usually. and the first to foul are #2 and #5. least thats how it is with our B42 with a 402 in it. You can get most of the distributor parts right at Napa also. not too many of those boat anchor gutless 401/402's around anymore haha. ~Matt Quote Link to comment https://www.bigmacktrucks.com/topic/18838-points-and-plug-part-s/#findComment-76680 Share on other sites More sharing options...
roscoe69 Posted April 26, 2011 Author Share Posted April 26, 2011 I can only imagine the lack of power out of this thing! I got it from my wifes boss, it's been sitting a few years but overall in good condition. It has a long frame with a 20' flatbed dump on it, the flathead is probably loaded carrying the truck around empty! Question; the shift pattern plate indicates a Mack 10 speed direct, do you split this trans or is it a 5 speed hi and lo?Thanks,Ross Quote Link to comment https://www.bigmacktrucks.com/topic/18838-points-and-plug-part-s/#findComment-76697 Share on other sites More sharing options...
Rob Posted April 26, 2011 Share Posted April 26, 2011 I can only imagine the lack of power out of this thing! I got it from my wifes boss, it's been sitting a few years but overall in good condition. It has a long frame with a 20' flatbed dump on it, the flathead is probably loaded carrying the truck around empty! Question; the shift pattern plate indicates a Mack 10 speed direct, do you split this trans or is it a 5 speed hi and lo?Thanks,RossYou split the gears if loaded. It will drive like a straight 5 if you want to but the gear spread is very wide.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/18838-points-and-plug-part-s/#findComment-76704 Share on other sites More sharing options...
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