how strong is the ls1 block? if i were to go like 427 stroker would i run into block integrity issues? i havent seen any big cube ls1's and was wondering if this is y, thnx

 

You won't see that many cubes on an LS1 block even if you had it resleeved.

Your best bet is a 6.0L truck block or an LS2 to achieve those goals.

Mike

 

The c5r race block is another good option

 

Victory Lane 427ci Longblock

Compstar M.I.D. Block
Compstar 6.125" LS1 Rods
Callies Racemaster 4.000" Crankshaft
Diamond Custom Pistons
Diamond Pro Select Rings
ET Perforamnce CNC Cylinder Heads
Comp Cams Hydraulic Lifters
GM Production Rocker Arms
Cometic MLS Head Gaskets
VRE Custom Spec Camshaft
Meling High Volume Oil Pump
Adjustable Timing Set
Chromemoly Pushrods
Clevite Rod Bearings
Clevite Main Bearings
Clevite Camshaft Bearings
ARP Main Studs
ARP Head Studs

 

A guy at work had his ls6 block bored to be a 427 at a place in houston. But, I will not post where b/c they do not support this forum. If you want to know, you can pm me. But, victory racing is a good company that I have heard nothing but great things about.