That TRW 427 piston gets it done. On a o decked block you want a 106cc head for 10:1cr.
You want the cr high enough but not too high. You must use quality 92+ octane gas in this motor.
not less than a 102cc head on this one.
the heads will need porting. The crank will need rebalanceing and the rods will need preparation.
Correct (block/crank/rods machining is essential. (there are no shortcuts)
A street friendly mechanical street roller cam works real well in this motor.
( essentually a STREET roller version of the 427-425HP L-72 cam) 244@.050")
EG Comp cams XR280R-10 11-771-8
EG Lunati VooDoo street roller #60232
or similar cam in this duration range.
What hood is on your 69 vette?
This is a failrly straightforward build but you want to work with a good machine shop/engine builder to bring it together.
It builds a very powerfull oval port head - unleaded fuel modern version of the 1969 427-425HP L72 corvette motor.
( makes a lot more power and torque and goes like hell....LOL.
"cheap" will get you stung and disapointed.
You have many of the good hard parts already.... block heads crank.
What is your location?
Last edited by F-BIRD'88; 04-03-2013 at 04:28 PM.