I am getting my stroker back from the machine shop tomorrow and I had him assemble the long block so he could check all the clearances. My motor should go back in and I should be driving by this weekend. Now for the question below is the motor I built (cut and pasted from http://jeep4.0performance.4mg.com/stroker.html ) I am using a clifford intake and quickfuel holley carb ( I know you are all think why didn't he use the fuel injection but I am just a carb guy at heart) So what Spark plugs should I use and what gap. I am also using a GM HEI distributor . I highlighted in red what has been suggested but I just wanted to hear the options and what gap on these plugs Any suggestions would be greatly appreciated. I also had the heads ported (1993 4.0)
Thanks Jeff
[COLOR="Red"]Autolite Platinum Pro Spark Plugs
Part no. APP985[/COLOR]
4.5L Low-buck simple stroker
Jeep 4.2L 3.895" stroke crank
Jeep 4.2L 5.875" rods
Speed Pro H825CP +0.030" bore pistons
9.6:1 CR
Mopar/Victor 0.045" head gasket
0.083" quench height*
CompCams #68-231-4 206/214 degree camshaft
Ported HO 1.91"/1.50" cylinder head
265hp @ 4900rpm, 325lbft @ 3500rpm
Thanks Jeff
[COLOR="Red"]Autolite Platinum Pro Spark Plugs
Part no. APP985[/COLOR]
4.5L Low-buck simple stroker
Jeep 4.2L 3.895" stroke crank
Jeep 4.2L 5.875" rods
Speed Pro H825CP +0.030" bore pistons
9.6:1 CR
Mopar/Victor 0.045" head gasket
0.083" quench height*
CompCams #68-231-4 206/214 degree camshaft
Ported HO 1.91"/1.50" cylinder head
265hp @ 4900rpm, 325lbft @ 3500rpm
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