Your choice will have to take into account available fuel.
I think the 6X and 7H1 will have chambers too large to deliver reasonable performance on a 350. The #11 may be adequate for a cruiser, but not with that cam.
If you have access to good quality high octane fuel without ethanol, you can run the 140s, which calc out to approximately 9.8:1 on a 350, as long as you match up all the valvetrain components.
The cam is a lot of cam for a 350, you may want to consider a slightly more moderate cam for street drivability.
Thanks for the reply, good quality high octane fuel is available such as Shell optimax and octane booster is also available. I only do 500 miles a year and want to drive the car to say 3 or 4 drag meets a year and just have some fun. I will be on the look out for some better heads but Pontiac heads are a bit thinner on the ground in the UK than the USA
I was thinking the 6x would would lower the CR too much and I was thinking have the #11 heads. I have a B&M Holeshot 2000 high stall TC to go in and I am on the lookout for a posi rear end and some better gears as I have 2.56 open diff
I don't really want to make a cruiser! Do you think the Pontiac N cam would be out of the question then? Because while this motor is out I want to put a decent cam in there. I have the finances for a new cam. The 350 has a healthy oil pressure and just needs a new rear main seal. Any recommendations for a cam.
Cheers Andy
Last edited by ineedalager; 07/13/1006:15 AM.
67 Firebird 350, TH350 auto Convertible, B&M 3000 TC, 4bbl Edelbrock Performer carb and intake Black Jack headers,disc brake conversion. 10 bolt chevy axle with 3.73's and B&M Rachet shifter.
