after a short time the plugs in the #2 snd #8 cylinders get an oil-fouled / too rich kinda look to them. The other plugs all look great. This is on a '67 396. Any ideas? :(

Do a compresion check all cylinder's,should be 140-150 compresion.If 2 and 8 are different,try some oil in cylinder.If higher seems rings might be bad.
Or aleak down tester for valves.Maybe some one will chime in for what else to check ;)

Could be a Valve Seal or could be rings. If it puffs a lot of blue smoke after a cold start, my guess would be a seal(s). Oil will drip down the valve stem past the seal & build up on the valve head itself. When you start it up, it all drips into the cylinder, & poof, lot of blue smoke. Try replacing both sets of seals on both cylinders & pray a lot during & after replacing them.

Jim graemlins/waving.gif

A.C.E.S. # 4996 ( aces member id kinda matches my 496 stroker )


Frame off red 71 Chevelle SS496 (balanced, blueprinted & decked 454 block, bored .060 from 4.25 to 4.31 & stroked from 4.00 to 4.25, edelbrock aluminum heads, 10.2:1CR, hydraulic roller 550 lift cam, eagle crank, true fulcrum roller rockers, billet double roller chain, airgap intake, demon 850dp with no choke, MSD 6AL, jet coated hookers, flowmaster 40’s, TH400 with extra clutches, shift kit & 3000 stall) Convertible with white stripes, top & interior loaded with factory options: TH400, cowl induction, power windows, locks, cruise, tilt, top, trunk, 12 bolt 373 posi, A/C, AM-FM 8 track, power drivers bucket seat, mirror map light, trunk, hood, glove box lights, on the wheel GM air pressure gauges, Delco Jac Pac 175 (under hood vacuum powered air compressor) with under dash Delco air pressure controller/regulator, complete with Jac Pac 175 air shocks.

http://chevelle.ogleonline.com/jim.htm

1952 Chevrolet 4 door Deluxe Sedan with a 216.5ci in line 6 with the last RAJO (RAcine JOe) Power Cylinder Head that never went to production, designed by grandfather in the 1940's. Joe designed, built & sold all over the world performance heads during the 10’s, 20's, 30's & 40's starting with an OVERHEAD VALVE CONVERSION HEAD for the Model T Ford flathead. Joe drove in the FIRST INDY 500 in 1911 as car # 8.

Watch for my SS496 Chevelle as a pace car at Indy in 2011 (100 years after Grandpa Joe) IF THEY WILL LET ME !