Davenalkie

Hey guys,need your opinion..got a 455 block,425 rods and the oversized pontiac piston,to go along with procomp aluminum heads,mondelo mov-2-3 cam,wich specs as follows...at.050 int dur 253,exh260. Int lift 574,exh 592..is solid mech cam ..also added a victor jr intake an a 1050 dominator.. haven't fired it yet what do you all think?

cutlassefi

Compression?
Very ill conceived combination on paper.

Alaska442

I'm still running a 14 year old build using the 455 crank 7 inch 425 rods and standard bore Pontiac pistons which is like .50 over bore. I think from memory.
I cant speak to your combination but the short block works well. It has proven to be reliable and it melds the best characteristics of a 425 into bigger cubes. It turned out to be about zero deck and flat tops with valve reliefs in the wrong spot.
This combo loves to rev and makes good power on the higher end. Mu combo is the edlebrock packaged hydraulic flat tappet cam, lifters I think the 520 lift. Stock edlebrock heads and torquer intake 1 3/4 headers.
I'm going into update to roller cam this summer and new valve spring, change gaskets but the engine is still good. oil pressure and compression.