Damn big blocks

[kramer75sandman]

it is tunnel rammed on straight gas we havnt fired it up yet hopfuly in the next month or so id put a pic up for yous but i carnt struggling

[kramer75sandman]

shes iron head pretty cool thing to have though i guess

[HK1837]

shes iron head pretty cool thing to have though i guess

Probably the same heads as what I just bought. Cast number ends in 990

[kramer75sandman]

Il have a look 2day when I head round there to see I'm on a mission to day putting a top loader in my one tonner cart wait to take it for a spin in a few weeks its a tunnel rammed small block with 4.44 diff should b a ton of fun

[HK1837]

See how long it takes to break it. My mate used to smash toploaders to pieces with a relatively tame 350 SBC (350-400hp). Had to go back to a Muncie as he got sick of changing boxes. I think he went through 3 or 4 in a 12 month period! The 4.44 Salisbury might give up before the toploader though, although the lack of traction in a tonner will help. Sounds like fun!

[HK1837]

Here is some pictures of the Mark IV 990 BBC LS6/&7 heads I picked up today. First few photos show a Gen VI 454 truck head for comparison:

990 chamber.jpg990 exhaust.jpg990 intake.jpg

I couldn't easily pull a red-black carby 308/304 head out for comparison but I had some old VN heads that I stuck next to them. You can swee how they dwarf the VN ports.

990 VN exhaust.jpg990 VN inlet.jpg

The heads look like they have been de-shrouded around the valves a little and they appear to have been cc'd at 134cc. Stock ones are claimed 118cc which will mean compression with the TRW replica 1969 L88/ZL1 piston drops from around 12-12.5:1 to about 10.5-11:1 which given I have an L72 cam rather than an L88 cam will probably be better anyway, at least it has a chance of running on 98 or 100 octane fuel.

[Alien DNA]

Its awesome when you compare the VN head to the BB. Small blocks are comical once you start playing with big blocks

You going for injection or N/A?

[HK1837]

850cfm double pumper, Holley remake of the original L88 carb, on a genuine COPO 427 intake. I think i'll need 1 7/8"tube extractors too with the size of these ports.