72 402 casting number 3999290 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BB72CHEVKT · 05-13-2011, 10:21 AM

I have a virgin block that says hi-perf pass on the back. Would that mean it was only in a car and was not a truck motor?

The heads are 6272292 and date 1272.

**leddzepp** · 05-13-2011, 12:11 PM

Yes. Camaro, Chevelle, or Impala I believe. I had one a while back also, and IIRC this is what my research came up with.

BB72CHEVKT · 05-13-2011, 02:00 PM

Quote:

Originally Posted by leddzepp

Yes. Camaro, Chevelle, or Impala I believe. I had one a while back also, and IIRC this is what my research came up with.

Have any idea what it is worth with the heads but without accessories?

**leddzepp** · 05-13-2011, 02:10 PM

I sold mine to a guy for $500. That was just the block and heads, no accessories. I think he bought it for his 72 Monte Carlo.

mightymouse · 05-14-2011, 12:08 AM

i think all big-blocks are stamped hi-perf pass. even truck motors.ive got one outta 78 big-10.dont know whats hi-perf about it

05-13-2011, 10:21 AM	#1
BB72CHEVKT Junior Member Join Date: Mar 2007 Location: Hideaway, TX Posts: 4,948	72 402 casting number 3999290 I have a virgin block that says hi-perf pass on the back. Would that mean it was only in a car and was not a truck motor? The heads are 6272292 and date 1272. __________________ 71 Suburban 350/700R4 Project Trixie 72 CHEVY,Highlander,SWB,396,T400 Last edited by BB72CHEVKT; 05-13-2011 at 10:28 AM.

05-13-2011, 12:11 PM	#2
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 19,990	Re: 72 402 casting number 3999290 Yes. Camaro, Chevelle, or Impala I believe. I had one a while back also, and IIRC this is what my research came up with. __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man

05-13-2011, 02:10 PM	#4
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 19,990	Re: 72 402 casting number 3999290 I sold mine to a guy for $500. That was just the block and heads, no accessories. I think he bought it for his 72 Monte Carlo. __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man

05-14-2011, 12:08 AM	#5
mightymouse Registered User Join Date: Feb 2011 Location: Crowley TX Posts: 979	Re: 72 402 casting number 3999290 i think all big-blocks are stamped hi-perf pass. even truck motors.ive got one outta 78 big-10.dont know whats hi-perf about it



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