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Old 01-15-2012, 09:56 PM
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496 build

I would like some opinions on using a MLS .020 head gaskets. I am building a 491 BBC with Edelbrock Performer RPM 118cc heads. Bore: 4.290 Stroke: 4.250. I have an Eagle Pro Series kit: 4340 steel crank, Icon #789 forged pistons 10.2:1, 6.385 H-Beam rods, Clevite bearings, Mahle ring set. Victor JR intake and a Holley 850 DP The cam I am using is a Crower mechanical roller #01485. Adv duration intake 296/302 and adv lift is 641/636. At .050 duration is 256/266 and lift is .377/.374. The lobe separation is 107* 103* intake C/L for lobe center method. Assembled the pistons are .025 from the top of deck. (stock deck height) and with the recommended head gasket 1017-1 .039 comp thickness the quench is .064. I want .045-.050. i can use a Cometic .027 head gasket which would still give me .052. The motor is going in a 67 Camaro with 400 auto transmission, rebuilt 12 bolt GM rear 4.11 gears, solid alum frame bushings, frame connectors, and Caltracs; 3400-3500Lb body. Something to mess with at the track on weekends. I want some opinions on using .020 steel shim head gaskets. I especially want to hear from techinspector1 on my setup. I like his analysis on motors. Thanks Doug

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Old 01-15-2012, 11:04 PM
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No reason you can't run the MLS gaskets, as long as you're piston to valve clearance is there and your heads and deck are flat.
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