[ChopperScott]

Hello there. I've got a complete small block Chevy top end off an engine that I threw a rod through. I am now entertaining the thought of another build. The parts I have include...

•AFR 220 Eliminators, 1110 competition ported heads, 8027 spring upgrade, titanium retainers, 65cc
•Crower stainless steel full roller rockers, 1.5 ratio
•AFR stud girdles
•Comp Cams 300BR-6 solid roller, 260/270 @.050, .630/.630, 106° lsa
•Comp Cams roller lifters
•Weiand Team G 7531 single plane manifold with 2" raised plenum, port matched
•One complete virgin Chevy 400 2-bolt engine (never disassembled)

•Rotating assembly... to be determined

I'm looking to build a high compression 406 cu in full race engine for nostalgia bracket racing.

-My first option is to have the Chevy 400 block machined for 4-bolt splayed main caps, punch it out to 4.155, and drill steam holes in the AFR heads.
-Next option is to purchase an aftermarket block and have the required machine work completed

If this was your build...
-Which option would you choose?
-Which aftermarket block would you choose?
-What are the pros and cons of each?

 

[ChopperScott]

Thanks for the informative replies. I was asking about the stock block because my old man has had that stock 400 sitting in his garage for decades. He always wanted to do a 406 track build with it and never got around to it. I was already leaning towards a Dart SHP, as I have another recently completed 11:1 434 build with the SHP.

 

[ChopperScott]

You say bracket racing: How fast are we talking?

We're talking 10.00's at 3000 lbs race weight.

 

[ChopperScott]

Top end in question…

 

[ChopperScott]

no rocker shafts?

No shafts on these. Those are Crower Enduro stainless steel full roller rockers, part # 73601, with AFR 6200 stud girdles. Excellent valve train stabilization, but a little more tedious when setting lash compared to shaft rockers.

 

[ChopperScott]

Speedmaster block would be a better start.

i know of someone putting 1300-1500 hp through two of the Speedmaster blocks, for several years now(Multiple nitrous stages, and now Twin Turbos (Wuhan war whistles). 406 and 421 cubic inch.

You'd be one of the few that has any good words for Speedmaster blocks.

 

[ChopperScott]

...front engine dragster for bracket racing in super pro box class...

Nice dragster! And very cool engine build on a tight budget. What's your dial-in? If you ever run it in the Northeast, let me know.

 

[ChopperScott]

Thank you. I dialed about 5.30/130mph. It went a quick 5.26...Youtube 'Lakeland dragster' to see this motors very first hit. Defeated a BBC dragster 540 with aluminum heads LOL

Solid run! Gear that bad boy for the 1/4 mile and it would compliment competition in NETO/C very nicely...

Member’s Rides – Northeast Timing Organization (NETO) – Nostalgia Drag Racing at its Best!

www.netonostalgia.com