Ive been debating on swaping my Summit TPI cam and Performer intake out for a bigger cam and Performer RPM intake on my 305. The hp doesnt drop off untill 5000 rpms and tq drops at 3700 rpm. At the time I was using an Edelbrock 600 carb. I swap'd out the edelbrock for a 600 Holley and will be tuning it in a few weeks on the gas. The motor still has the 416 heads but they are fresh. How much will these heads support and flow well with a carb setup. What combos did you run and have luck with? The trans is a th350 with a 2400 nitrous holeshot and 3.23 gears.

 

The heads will support more with some port clean-up, and even more with 1.94" intake valves.

Ported World S/R 305 heads on Berlinetta #1, you can see how "poorly" it performs with what's in the sig below.

 

if the motor drops off at 5000, i wouldnt shift higher than 5500. Depending on your valvetrain you can spin it to 6000 but with that combo it doesnt make sense

 

what are you trying to achive here?

 

Wanting more power but I dont want to do a cam and intake to only gain 5-10 hp because the stock heads are gonna hold it back. Im sitting at 178hp/229tq right now and would like to be more in the 190hp/240 tq range with this setup. Now that I have a holley carb I think that we can play with the timing and fuel to get it closer to that. The a/f can be leaned up about 1.5 numbers. Im also looking for some lope, the tpi cam sounds good when its cold but it idles like a stocker when its warm.