1970 L78 CKO Block from Van Nuys

[bulletpruf]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Cranberry70SSL34</div><div class="ubbcode-body">I know. I have a day 2 70 SS 396 with prepped TH400 and oval ports with big valves and stock 2240 trw 10.25 and a solid roller cam with old school weiand xcelerator with Holley 850 carb with 4.88 gears. All of it buttoned up with stock pulleys, valve covers, clutch fan etc... I can tell you a stock LS6 has no chance. That 396 with a TH400 will haul the mail my friend and it's in L34 form. In L78 piston head combo it would even be better especially on the top end. </div></div>

Might not be a popular opinion, but I figured a similarly equipped (cam, carb, intake, compression) oval port 396 would beat a rectangle port car. In a 454, where you have more cubes to support the flow and don't need as much torque, might be the opposite.

[EZ Nova]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bulletpruf</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Cranberry70SSL34</div><div class="ubbcode-body">I know. I have a day 2 70 SS 396 with prepped TH400 and oval ports with big valves and stock 2240 trw 10.25 and a solid roller cam with old school weiand xcelerator with Holley 850 carb with 4.88 gears. All of it buttoned up with stock pulleys, valve covers, clutch fan etc... I can tell you a stock LS6 has no chance. That 396 with a TH400 will haul the mail my friend and it's in L34 form. In L78 piston head combo it would even be better especially on the top end. </div></div>

Might not be a popular opinion, but I figured a similarly equipped (cam, carb, intake, compression) oval port 396 would beat a rectangle port car. In a 454, where you have more cubes to support the flow and don't need as much torque, might be the opposite. </div></div>

No not really. &quot;PREPPED&quot; OEM ovals (781's/049's) WILL and DO support 800+Hp. Not an &quot;auto&quot; guy, but my L34 '69 Nova when I did it to L78 spec bottom end, small roller and mildly ported &quot;840&quot; heads with Holley strip Dom intake, 800 Holley and 4.56's would run 10.40's thru muffler, slick and M-21. Just a nifty little streetcar with OEM stuff.

[bulletpruf]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: EZ Nova</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bulletpruf</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Cranberry70SSL34</div><div class="ubbcode-body">I know. I have a day 2 70 SS 396 with prepped TH400 and oval ports with big valves and stock 2240 trw 10.25 and a solid roller cam with old school weiand xcelerator with Holley 850 carb with 4.88 gears. All of it buttoned up with stock pulleys, valve covers, clutch fan etc... I can tell you a stock LS6 has no chance. That 396 with a TH400 will haul the mail my friend and it's in L34 form. In L78 piston head combo it would even be better especially on the top end. </div></div>

Might not be a popular opinion, but I figured a similarly equipped (cam, carb, intake, compression) oval port 396 would beat a rectangle port car. In a 454, where you have more cubes to support the flow and don't need as much torque, might be the opposite. </div></div>

No not really. &quot;PREPPED&quot; OEM ovals (781's/049's) WILL and DO support 800+Hp. Not an &quot;auto&quot; guy, but my L34 '69 Nova when I did it to L78 spec bottom end, small roller and mildly ported &quot;840&quot; heads with Holley strip Dom intake, 800 Holley and 4.56's would run 10.40's thru muffler, slick and M-21. Just a nifty little streetcar with OEM stuff. </div></div>

Mid 10's is pretty darn impressive!

Built a pretty nice 325 hp 396 for my '66 SS -- forged flat tops, stock heads with SS valves and roller rockers, moderate hydraulic flat tappet, M21 and 4.56's (originally 3.31). Stock Holley on the stock iron intake. Had a bit too much gear, I think, but should have run pretty strong. Sold it before I got to drive it; someone made me an offer I couldn't refuse. Was an Aztec Bronze car w/bronze guts. Will have to find another one some day...