Yes Hyd Or Solid? Do Use Top End Resrtictors If Its A Solid And Also Drill The Center 3 Oil Feed Holes Through The Cam Tunnel And Into The Main Oil Galley. The Drill Size Is .290 Or The Next Size Up From Original Hole. Those Center Mains Have To Feed 2 Rods As The Ends Only Feed One.also Get A Small Base Circle Cam And Rods That Are Clearanced For The Cam They Will Hit And Block Will Also Hit .the Best Way To Build It If Its In The Budget Is Get A Tall Deck Dart Block Cam Is Raised .300 To Clear All Roating Parts.