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Tom · 10-21-2003, 12:26 AM

Pistons- get 10:1 with 64cc head pistons and you'll be in 91octane range. You can do 9.5:1 on 87 octane with enough cam and the right timing. Id go with some slightly dished pistons and aim for the 9.5:1 compression.

headers- get 2.5" collectors, not 3". Primarys are good size.

Edelbrock 1904 carb- overpriced. Either rebuild a Qjet or get a 650cfm holley/demon carb.

Ignition- your going to want to upgrade the Hei a little bit. I personally like the super HEI kit from MSD, blaster 2 coil and 6a box for about $200.

With the comp XE268 and vortec heads you'll want 1.5 rockers. 1.6 will require the valve guides to be cut down and the pushrod slot to be opened up.

Lastly, the shortblock. Don't skimp here. Get the blocked bored WITH A TORQUE PLATE. Get ARP rod bolts [trust us, these a more then worth it] and the rods re-sized with these ARP bolts. Also ARP makes some great inexspencive head bolts.

10-21-2003, 12:26 AM	#5
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,760	Pistons- get 10:1 with 64cc head pistons and you'll be in 91octane range. You can do 9.5:1 on 87 octane with enough cam and the right timing. Id go with some slightly dished pistons and aim for the 9.5:1 compression. headers- get 2.5" collectors, not 3". Primarys are good size. Edelbrock 1904 carb- overpriced. Either rebuild a Qjet or get a 650cfm holley/demon carb. Ignition- your going to want to upgrade the Hei a little bit. I personally like the super HEI kit from MSD, blaster 2 coil and 6a box for about $200. With the comp XE268 and vortec heads you'll want 1.5 rockers. 1.6 will require the valve guides to be cut down and the pushrod slot to be opened up. Lastly, the shortblock. Don't skimp here. Get the blocked bored WITH A TORQUE PLATE. Get ARP rod bolts [trust us, these a more then worth it] and the rods re-sized with these ARP bolts. Also ARP makes some great inexspencive head bolts. __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.