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  1. Johnny Mac

    Weird 904 to 408 magnum starter interference issue. Dakota starter won't fit? 64 push button trans. is that the problem?

    Hey Friends, In short, have a customer going rounds with starter motors. he has a 64 A body. with a 904 push button. our magnum blocked 408. His shop is absolutely destroying him on labor to attempt to randomly install random starter after starter motor. he has the dakota starter in hand...
  2. Johnny Mac

    Suggestions for new design Aluminum Mopar SB clean slate (kind of) cylinder heads

    All, Time for our mopar sb lineup to get some love. I'd like to ask the masses to chime in with suggestions / observations for a BluePrint Engines Mopar SB cylinder head. (with a catch of course) Here are some facts that are Non negotiable. Some of you won't love the "Limitations" ...
  3. Johnny Mac

    Did LA water pumps ever get fine thread bolts from the factory?

    One of our friends in the business, caught a shipment of LA water pumps, with fine thread 5/16 - 24 fan / pulley bolts, vs 5/16 course. Was this ever a factory thing? OR just a shipment of mis tapped water pumps? I hadn't heard of it, but figured you guys would know!! Luckily they weren't...
  4. Johnny Mac

    1967 318 to 360 motor mount help please.

    Hello guys, trying to help a customer out. Every SB mopar i have ever owned had 2 bolt hole bosses toward the front, and one toward the rear. I'm aware of the 318 to 360 "spacing" difference where some install a spacer. BUT, i have a customer with a 1967 318 that appears to have 2 bolt...
  5. Johnny Mac

    Early front pulleys/ps pump. Onto 1970+ 360. What needs changed?

    Good Afternoon all, Hoping you can help me, help help a customer. Customer has all stock bracketry off a 1968 318. from his running/driving barracuda. it had the early driver side dump water pump. i have confirmed it has a saginaw PS pump, not a federal. He has bought my 408, which for this...
  6. Johnny Mac

    Extending valve cover baffle. Thoughs?

    Hey all, Asking for opinions! Through the traps I get some oil spray out of the passenger side breather. Instead of a vac pump, or an evac kit...I think I will try something simple. Below I took off the valve cover, and discovered it has a baffle (which I knew) but it's pretty small, and...
  7. Johnny Mac

    Johnny @ BluePrint: How To: Mounting an Alternator with an Electric Water Pump SBM

    Johnny Pace submitted a new Article: Pace Performance How-to: Mounting an Alternator with an electric water pump SBM Read more about this article here...
  8. Johnny Mac

    1978 318 heads? Small port? Or large

    This should be simple enough for some of you more versed in 318's than I. Some of you may have seen my other post about picking up a 78 dodge with a 318 and a 2 bbl. Was there a changeover year where all L.A. engines had the same 360 port heads? Despite 2bbl or 4? Or because this hog had a 2...
  9. Johnny Mac

    Smallblock alternator relocation ideas?

    I've got an issue with throwing my alternator belt. I have an electric water pump, so my belt only runs from my stock crank pulley, to a powermaster (chrysler case) alternator. Also manual steering so literally the only accessory using the belt and pulley. I believe the issue is the fact that...
  10. Johnny Mac

    would you use a block with epoxy?

    would/has anyone in here ever used a block with a tiny bit of epoxy in the lifter valley? this block was race prepped, completely ready to go with oiling mods, stroker clearance, clearance for solid rollers, bored, honed, align bored,decked, so on and so forth equating to almost $900. long...
  11. Johnny Mac

    advice on sb roller oiling

    Hey guys, i'm finding conflicting information on the nightmare i'm running into of unforseen grinding and oiling mods while installing a full roller into my 408 stroker project. main and immediate problem in the huge amount of grinding to get the link bars and rivets to clear on my crane/morel...
  12. Johnny Mac

    super commando LP Rockers?

    Hey guys, I'm about to start putting this new engine together and came across some interesting information that i thought i should share in case anyone else comes across it. I had picked up a set of Super Commando Large port smallblock cylinder heads for the latest 408 stroker. Mopar, in all...
  13. Johnny Mac

    Commando heads. Anyone used them?

    I'm putting together another 408 this winter and have been looking at flow numbers and head options. Looks like the sad truth is that no production mopar head flows phenomenal numbers without extensive porting, polishing, and valve jobs. I originally figured i'd buy an assembled set of...
  14. Johnny Mac

    LA 360 casting number..and has GM accessories???

    hey guys, 2 part question/discovery here.. I figured i'd run the casting number on a 360 engine i just picked up and tore down. It was complete from the thermoquad down, and clutch fan to 727. Got a very nice deal on it since it will be my winter stroker build, i basically only want the...
  15. Johnny Mac

    408 stroker build sheets

    Anyone want to give up a 408/410 parts list? something that has worked very well and put down some nice numbers. i was running a crate 408 that made 380HP and 460 Ft lbs.... i always considered this to be fairly low, but my car being set up with a great converter it still ran 12.00's. the cam...
  16. Johnny Mac

    rear main seal/ v cover leak???

    OK fellas, apparently my 408 (LA 360 base/mag heads) has managed to spring oil leaks in every direction just from sitting in a garage all winter. the engine has probably 20 quarter mile runs last year and maybe 150 street miles, then it got garaged up for the winter. my problem is when i...
  17. Johnny Mac

    anticipate the worst??..antifreeze on ground

    so upon a trip out to the race car garage to grab a tool,..i found a small...6 inch puddle of antifreeze under the car...of course i have antifreeze in the car...but popping the radiator cap i find ice crystals...and the puddle is obviously not the entire contents of the radiator.....brand new...
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