Hey guys first time poster.
So im building an l67 ISH motor. The bottom end is from a 2000 firebird. Flat top pistons which are 9.4:1 vs the 8.5s the dome stock l67s have. 2.8 pulley, intercooler. Heads are ported, larger stainless valves and milled .030. Zzperformance NIC camshaft with headers. Im porting the blower and using a Northstar throttle body that will be ported. Manual 5 speed izuzu trans
Here's the questions I have:
1: pushrod length. Just wonder if anyone knows off-hand with 1.65 rockers, .030 milled heads and .063 head gaskets what size is best? I assume shaving .030 and then adding .050 on the rockers id be .020 shorter which is within tolerances. But maybe im wrong here?
2: on the subject of head gaskets... this engine was bored .040 over. Does anyone know or have a link to a company that has .050 or .060 bore multilayer head gaskets and or can I use L32 gaskets from like an 08? [Im actually a gm world class master technician, so ill just get them through my parts department if I could]
3: on a stock 99-03 pcm. Can they run a flex fuel sensor? I asked my tuner and he said hes never dealt with the blue and clear style pcms.
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Matt Pelissier
[This message has been edited by Mattrevenir (edited 11-30-2025).]
