I'm planing on doing a 350 rebuild and was wondering if anybody has used this kit from Holley, any information would be appreciated, thanks.

I've got that kit (300-504). I just finished the short block for it. Will be doing the port match in the coming week. Nothing really special: 10.5:1 forged flat tops, forged OEM 3.48" crank, milodon oil control, blah blah blah ... What are your questions? Post here or email me direct and I can answer your questions.

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George P. Lara
1984 "L69" A4
1994 LT1 M6
Member:
SCCA, SCFB, SC3GFB

[This message has been edited by MRZ28HO (edited January 23, 2001).]

What kind of power do you expected out of it and are you using your stock carb and computer?

Also, how much did it cost you to have your short block ready, where did you get the parts and how much power can you run with it? The only thing I've done so far is disassemble the block and if haven't decided on what I'm going to use for my short block. I would like to run 400-500hp with maybe a supercharger but I want to use the stock carb. I have an '84 Z28 with the lg4.

Isn't that wee 305 LG4 carb a little small for SC'ing a 350 into 400-500 hp range???

Do carbs and sc's mix very well??

I think with the right jets and an electric fuel pump it should be ok.

The power output is guestimated at 400 fwhp using Desktop Dyno. A friend of mine used the newer 2000 version and I used the older version, but Holley told me it should do at least 375 fwhp. I experimented with "different" components and found that with a single plane I could (theoretically) attain 458 fwhp @ 6500 rpms and 429 fwtq @ 4500-5000 rpms. Mind you, these figures (I believe) are inflatted by Desktop Dyno, I am hoping to have enough time to dyno the engine before dropping it in the car for the true figures. After which I plan to dyno my '84 to get the true drivetrain loss figures. For emmissions testing I will be using the OEM E4ME (CC carb), distributor, un-modified computer and the supplied dual plane, but after that I will be using the single plane and M4ME carb (non-CC carb) with a tricked vacuum advance distributor. I could use the OEM carb (305 carbs and 350 carbs are the same, no difference. A Q-Jet is a Q-Jet ), but I feel I can have more flexability with non-computer controlled units. I bought the rotating assembly from PAW (crank, rods pistons) and assembled it myself. I had a local race shop check my block (350 bored .040" over) to see if it would hold up, it checked out very good. They also decked the block as per Holley (and my measurements) recommendations. The total for the Holley kit was ... get ready ... ~$3000 (after tax) for the emission legal kit (300-504), the non-emission kit is ~$1500 (300-503?). The rotating assembly cost $700 (fully balanced and hung pistons).