Thread: BBC 496 Heads question

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I am sending a 70 454 to the machine shop to be stroked and bored ,it has oval port cast heads ,I am not racing but want a torquer engine ,should I keep the oval ports .I was told these make more low rpm torque I will be running a built up 700r4 and a street cam ,I have a buddie with a set of rectangle port heads he said he'd trade if I need them ,I was told for a street eng ovals would be better,both will be port and polished (my buddy does em for free)its all going into a 69 Nova SS,wouldnt low rpm torque be better for the street ?

"wouldnt low rpm torque be better for the street ?"

yes

Originally posted by 75mbsl
I am sending a 70 454 to the machine shop to be stroked and bored ,it has oval port cast heads ,I am not racing but want a torquer engine ,should I keep the oval ports .I was told these make more low rpm torque I will be running a built up 700r4 and a street cam ,I have a buddie with a set of rectangle port heads he said he'd trade if I need them ,I was told for a street eng ovals would be better,both will be port and polished (my buddy does em for free)its all going into a 69 Nova SS,wouldnt low rpm torque be better for the street ?

i have bulit the 496s both ways the big O ports are a great heads and will flow better than alot of socalled hi hp heads that were used by the big 3 so do not look down on them 2.250 intake and1.880 ex and 11/32 stems valves the O ports will work very good. i do work on the cambers to a polish and the ex side to .watch the short side radii on the ex ports that you do not screw with it to much and a good bowl job you want the intake runner ruff do not touch it a good 3or4 angle valve job and back cut the valves and they will work great

Pat just saw your pics ,the GOAT is awsome!!!!

thanks. that gto has alot meaning to me it was my dads. he own it when it was new . and went for some good rides in it when Iwas a kid. he had some big blocks in it to back in 1968 .it has come a long way from them days and much faster :

Oval Port heads will wrok just fine. Add 2.19/1.88 valves and do some pocket port work and you will be happy.