......ok so I picked up a donor set of 416 heads last night....14014416 is the full casting #. Here is what i plan on doing to the 305:

*Send out heads, have them pressure tested/magnafluxed/acid dipped to clean them/decked(if necessary)
*New springs/valves
*Port/polish, gasket match, etc

On top of that, I will be adding the following to the motor:

*Summit Cam/Lifter part #SUM-K1102 (262/int, 272/ex)
*Hooker 2055's
*SLP Runners
*58mm Throttle Body
*POSSIBLY all new MSD parts instead of keeping the Accel Stuff
*Entertaining the idea of SVO injectors

So i have the following questions:

*Is it reccomended that I touch the intake ports at all on the intake itself and/or the heads?
*Good idea to have the shop mill the heads a bit to give more compression?
*Since I'll have a full exhaust after the headers, I'm just wondering what kind of power I should be making roughly HP wise....

Thanks everyone...

 

TTT

 

If you're going that route, then do ALL the above except, get a 52mm TB instead of a 58mm. Port-match the intake to the heads, and portmatch the plenum to runners and 52mm TB. Gut air box too. I'll have ram-air boxes available for purchase soon. They will be just like mine, only the new ones will be made out of ABS plastic.

Here's a pic of my metal boxes:

 

2.

 

Oops, sorry, I just realized you have a firebird. The boxes will only fit Camaro's.

 

Hehe, thats ok.


Ok, i'll get the 52mm TB instead. I just wasnt sure if port-matching the intake to the heads, and the plenum to the runners was a good idea or not since this is a 305, not a 350 or something else that makes more power.

What kind of power should I expect from doing all this?

 

I would estimate about 250 - 260 at the rear wheels (provided you have the PROM tuned correctly for the changes), AND a butt-load of torque!

You will notice a decent increase.

 

Not bad #'s for a 305. I'd probably have to have a custom prom done to get those #'s though.....definetly necessary for the SVO injectors....

 

I can do your custom PROM. PM me if you need help with it.