I developed a crack in my long tube 427 manifold on the inside of the passenger side piece.  I cleaned it up, gouged it out, and drilled the ends of the crack.  I then heated it up and welded it with stainless wire.  everything looks good after grinding and sanding the weld down but when I put dawn dish soap on it and run an airline down inside the header, I have a ton of porosity around the welded area.  Is there a ceramic or other coating that would work for this?  I am thinking Cerekote.  Any other suggestions?  Thanks

I bought my 61 starliner over a year ago.  It has a 390 tri power, c6, stock converter, and 3.00 gears.  I was not happy with the power I had around town. I played with timing and bought HPTrends tripower bible but was really limited not knowing what the cam, compression, ect.  I am building a 428 for it and would like some ideas.  I will be using the tripower and cast iron long tube headers just for the under the hood presentation.  My initial thoughts are port matched Edelbrock heads, roller hydraulic cam, and stock ford adjustable rockers teamed with a stall converter and taller gear. I would like to keep the car below 10.5:1 compression.  I would like suggestions on cam, stall rpm, rear gear combo.  Are the gains of Roller rockers worth the investment. Jays book mentioned using a holley 500 carb in the middle, some searches from the other forum talk about 500's as the outer carbs?  has anyone tried either of these combinations?