I have my 243s milled .30 on a 07 5.3 flat top pistons and i used 7.35 so far working well!

 

quick answer...nope

 

Junior06... ur the man that's the best answer I've got... ill use a pushrod checker when I do the milling and ill c what I need.. but having 7.375 in hand will make it much easier.. lets just hope that's what I need... thanks everyone for all ur help.... btw ill b doing. 035 on the heads...

 

They're Patriot Performance milled .050, I haven't even gotten around to check pushrod length, my problem is LSXrt intake manifold fit.

 

well wish u luck man... i didnt get my pushrods in so i guess ill be running the 7.4 back home... changing them as soon as i get my new ones...