Wanta do the top end of a 1989 MAF LB9 305. The 305 heads will get ported and polished. New seals to stop the smoke.

The CAM is the big question. It already has the 350 cam from the factory. N10 exhaust. No AIR. 52mm TB. Gutted CATs. Exhaust manifolds are staying, but I will clean them up internally. Clean N10 setup, with a CAT back.

Money no object. Already running the 22lb Delphi injectors with stock prom, runs great.

The TPI base will get ported. I would consider 1.6 rockers

What CAM would you recommend that’s slightly bigger than the 350 L98 OEM cam? Please remember, these LB9's cam with the L98 cams. Just looking for slightly better, with maybe a mile lope.

 

Depends on stall and if you’re going to do springs and guide cutting if necessary but summit 8800 would be a improvement

 

0 stall is fine. T5

 

Among those, I think the 2nd one is the best choice.

Another good TPI cam is the Comp "501" grind 08-501-8. TPI is very particular about cams: the cam MUST agree with TPI's tuning, which relies heavily on the intake closing event. A "bigger" cam will often basically make it fall flat on its face, by disrupting that "tuning". "Tuning" is like a musical instrument; a trumpet or something; the pitch (frequency, aka RPM in an engine) is determined by the length, and nothing you can do will change it much. It's not about flow, it's about the "tuned" effect, which is highly RPM specific; the cam MUST work WITH TPI's tuning, and not deviate from what the intake system enforces.

Porting, heads, rockers, etc. changes NONE of that. That stuff may well make it work "better" by increasing cylinder fill at the RPMs that TPI reinforces, butt TPI will do what TPI does at the RPM that it does it, and as long as those runners are there, your RPM range is handed to you in concrete. Work WITH that and don't think you're going to overcome it somehow.