No such thing as a stupid question! Only stupid answers! From what I have been told the dart block is a different series and based on the MK5 series?? Welcome newbiedevil We all were at some point! MAnyone know if a Dart Big M is a mk iv or 5/6 block. Sorry for the newbie question.....
All the Dart stuff is MK IV GM, hardware friendly. Gen V, and Gen VI share the same one piece seal crank, and same oil pan, Timing covers are totally different.
Hope this helps:Does anyone have a Durobond P/N for the cam bearings or are they only available from Dart?
Oh dang, I forgot to mention that. Thanks for bringing it up as my info could have led to him getting a little ticked off.:|err The oiling system is more like the later model big blocks, but the cam bearings go in just like the standard Mark IV blocks (where the oil hole is visible through the mains). The later model engines have to have the oil hole located at 10 O' clock.Unless you have the lifter bores cut it will be necessary to run .300" taller pieces, which aren't typical to the Mark IV. All other compontry is Mark IV bolt on. Cam bearings are special Dart P/N's.
We just pulled our 622 dart block out of our jet, to go into a hydro. We had a NICE pan made. Ill get you the information later this afternoon, if your interested.Thanks, I bought a built 598" motor out of a jet, trying to convert to v drive for my hydro, not sure which oil pan to get. Is the only difference between the series (in terms of oil pans), the rear main seal?