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Well after messing around with the BBC 461 and had good luck with the peanut port heads but not with closed cambers I am switching gears and using a spare 406 I have in the garage. No one wanted to give anything for it so I am making it my next project. It will be a flat top forged piston engine with my old CC 292H that ran pretty good in the old 358 as this new engine will be more of a street oriented. I am going to use some Vortec heads on this project and will test a bone stock pair except for cutting the valve spring area for using better springs and seals. They will also have a nice 3 angle valve job but otherwise bone stock no porting.
The second set of heads will have some porting work in the chambers to unsrhoud the intake valves, the valves themselves will be back cut but are the same GM valves from the heads. The heads will also be bowl ported and a complete cleanup in the exhaust port. My goal while high is to put this 406 in the high 10's@ around 120mph. Can I do it? sure can if this engine will make 500hp and 500 lb. ft. of torque. Sould be an interesting year in 2020 testing more pure junk to give the LS guys more fits at the track with the little SBC.
The second set of heads will have some porting work in the chambers to unsrhoud the intake valves, the valves themselves will be back cut but are the same GM valves from the heads. The heads will also be bowl ported and a complete cleanup in the exhaust port. My goal while high is to put this 406 in the high 10's@ around 120mph. Can I do it? sure can if this engine will make 500hp and 500 lb. ft. of torque. Sould be an interesting year in 2020 testing more pure junk to give the LS guys more fits at the track with the little SBC.
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