So i picked up a set of built heads. Not from original owner. So had no clue who cnc'd them. But are 243. On face of heads stamped E011
They have 2.02/1.57 valves. My harbor freight mics measured from my unmilled 243 to these cnc heads, .023 so idk exact amount milled.
Now I'm running mild cam. The SDparts LS6 power max plus cam and factory mls head gaskets. So I'm thinking I should just order 7.374in pushrods. I was running with my factory 243 heads 7.4 cr-mo pr's. But being a mild cam and heads milled, I should still be ok with 7.4 pr's right?
Anyone with similar combo?
Thx in advance

 

what engine are you putting them on?

 

You should always measure especially given you know so little. I'd likely have a local shop deck the heads just enough for cleanup and check the spring pressure.

7.375 wouldn't surprise me but only one way to know. Lifter choice can also change length due to the height of the lifter and acceptable preload.

 

Since you'll have the heads off, it's a great time to upgrade lifters if you have stock lifters.

 

Not 100% sure yet... But prob my 02 SLP UltraZ. I'm not touching the low mileage LS6 shortblock, but thinking boutz throwing these heads on the ole garage queen with a nice stg3 cam. And thinking having TPIS do the 90mm mod to my intake mani. These cnc'd 243's have to be close to prc 2.5 243 heads.

 

I only use GM LS7 lifters. Or I'll re-use mine since if going on my queen, they have low miles. Not my 1st or 50th rodeo.. Those used head bolts are just from last 18 months approx of rip end swaps I've done between gen3 and 4 motors. I've reused lifters in gmt800 applications with 200k miles on them and never have the truck come back. Hell, about 20k miles ago in my mom's 05 yukon, 5.3 LM7 with 245k miles on the clock, I did the head gaskets and didn't change out the lifters. Runs great with cai and free mods done.

 

So I'm thinking you should actually measure for pushrod length.