The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Would you do it? Rip out a Turbo LS for a Big Block

**Ironangel** · 06-12-2023, 01:04 AM

I was going to say what the others said, clean up what you got and enjoy it! Meanwhile, get that big block on a stand and start gathering parts. I had a 69 L34 396 in one of my 72's and wasted the block when a valve let go. I took a 454 truck block and bored it .060" over and stuck the 396 forged crank in it with factory rods and JE forged domes. I used the 69 290 closed chamber iron heads, a solid Clay Smith cam and Howards EDM lifters. Comp Magnum rods and roller rockers. A radical 12.5:1 punched out and balanced 427 screamer that maybe makes 600hp @ 6K rpm. Cant afford to drive it with 110 octane going for $17 per gallon! It's alot of fun but barely streetable... First pic is the 396, second pic is the 427 (439ci)

06-12-2023, 01:04 AM	#16
Ironangel Senior Member Join Date: Feb 2010 Location: Falls City, Nebraska "100 Miles From Nowhere" Posts: 2,219	Re: Would you do it? Rip out a Turbo LS for a Big Block I was going to say what the others said, clean up what you got and enjoy it! Meanwhile, get that big block on a stand and start gathering parts. I had a 69 L34 396 in one of my 72's and wasted the block when a valve let go. I took a 454 truck block and bored it .060" over and stuck the 396 forged crank in it with factory rods and JE forged domes. I used the 69 290 closed chamber iron heads, a solid Clay Smith cam and Howards EDM lifters. Comp Magnum rods and roller rockers. A radical 12.5:1 punched out and balanced 427 screamer that maybe makes 600hp @ 6K rpm. Cant afford to drive it with 110 octane going for $17 per gallon! It's alot of fun but barely streetable... First pic is the 396, second pic is the 427 (439ci) Attached Images __________________ Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American"