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Hi everyone, Need some help with a factory 383HP. Did 1969 383 Roadrunners come with spark plug wire heat shields on cylinder 6&8 and 7? My car was build end of March.

I am going to double check the cc’s on the heads tomorrow. Should I keep the compression under 9.5:1?

Update on my original post. Bore-4.280 Rod-3.375 Piston-L2315F The short is together with a flat top piston and it’s .008th in the hole. Cam is an MP 272 adv & .455 lift & 112 lobe 915 Heads are slightly ported they flow 233 @ 500. Db4p slightly ported single plane intake Going to run...

Good point on the single plane vs dual plane with EFI. I will look into that. 67charger383 thanks for the offer but the block is 30 over. My 906 heads are 88ccs. The 915s when I originally measured them they where 78 CC’s. The heads need new valves and now according to the engine builder they...

I finally determined the purple cam is P4286676. (Adv 272 Intake/Exh, .455 lift, 112 lobe) I need some help with making this combo work. I wanted to use my 915 mild ported heads 81.5cc, with Edelbrock DP dual plane intake, stock manifolds, L2315F 030 pistons, Felpro .039th head gasket, with...

What’s the stock 69 383 hp cam specs? If I remember correctly the original person that changed the cam many years ago said it was one up from the factory specs.

He is going to calculate the duration and let me know. Is that normal for the CC’s on the 915s to be at 83.5 with new valves. I guess they sit a lot higher then the stock valves.

Sorry I made a mistake. The compression was 8.9:1 and I used 14th as an average. The block is definitely not square. The front on one side is 11th and the back is 19th. The other front side is 15th a back is 13th. I was curious to know what cam was in it. The engine builder measured the lift...

Delete post please

Yes they are the big valves. I have a set of Ferrea 2080x3/8x4875 and 1740x3/8x4910 I would like to use. The block doesn’t need to be bored. I am using the piston that where in it. They only have 5000 miles on them. L2315F 030 pistons.

Hi, I just tore apart my original 383 from my 69 RR. The motor had 8.9:1 compression. With manifolds and cast intake it made 280 hp. It had 906 heads with flat top pistons 30 over. I called Mopar performance, and they could not tell me what purple cam from the cam numbers. I would like to...

Hi, I am going to be using a new set of Superformance oil pan gaskets with a windage tray. The motor was assembled with Permetex Right Stuff. I had a hard time removing the leaky oil pan. That stuff is like cement. What does everyone recommend. Right stuff or ultra black on the gaskets? I...

Thank you everyone for the great information. I am sure they are not cheap to build but you got to love that elephant under any Mopar hood. This gives me a good starting point and what I need to start looking for. Thank you

I am currently running a 400 block stroker in my 69 Roadrunner. I am considering installing a Gen2 Hemi. Not sure what I would need to install one. Is the K-member the same? Engine mounts? Flywheel? I have a big block lakewood scattershield. Can I resuse the bellhousing? Any info on the 426...

Thank you for all the great feedback. Might try the milodon this time around.

Does anyone know if there is a difference between Mancini and 440 source repop 6 quart Hemi pans? Besides price. I see Milodon also makes one. I ran one from 440 source in my B body that worked great. Looking to buy another for my B body. I see the Milodon has some better welding but not sure...

I used arp studs with 12 point nuts. They worked great. I can’t remember if they take a 3/8 or 7/16 12 point socket. I can check later today.