New Hemi Block from Jason Line

[steve maluk]

you are right / i am positive my 69 roadrunner is not a matching number car just want to lift hood and see an elephant
way to far into this hemi to back down now so full steam ahead got a bit more to get before putting together
still need help with this lifter bore milling anyone know why lifter bore area is milled? i read for high lift roller cam lifters?? just dont know for sure

 

[steve maluk]

hello can anyone help with this lifter valley milling i have been told for high lift roller cam / lifters i need to know if i have a problem with standard lifters thanks

 

[steve maluk]

mopar are proud people talk hemi it gets expensive by the minute
mopar no car

 

[HawkRod]

hello can anyone help with this lifter valley milling i have been told for high lift roller cam / lifters i need to know if i have a problem with standard lifters thanks

View attachment 1475858

Don't hold me to this, but I believe the milling is to allow clearance for very large OD pushrods, so you can use very high tension springs in your heads. Also roller cams and lifters with high lift cams need extra space. This block is obviously made for very high horsepower (multi thousand) applications, but I can't imagine you would have an issue with standard lifters.

Having said "standard lifters" I'd highly recommend you go with a roller cam for this engine. Yes, they are more expensive, but in my opinion, worth every dime in both durability (no worries about wiping the cam) as well as lift and overall area that the valves allow for transfer of air.

Good luck building your engine - I'm sure it will be sweet!

 

[steve maluk]

thanks
i am definitely not going big hp i wanted a hemi possibly to cram into my roadrunner 69 i was searching for a 426 block $$$$ but with no luck so i found this block got it because i became impatient and wanted to get started on putting a hemi together had a bad itch in my pants
it will be a 540 cube engine street / auto /extremly small stall just dont want all the intense white knuckle steering wheel grip / just over the ball busting big hp stuff. my springs are only rated for 500 lift heads are stock 66-70 oem cast heads ss valves
great advise on the cam will highly consider but would really like a hydraulic cam high 4 to 5 lift any recommendations
great thread
thanks
steve

 

[dvw]

The lifter bores are tall to support the lifter better. The only time you have to mill the tops of the lifter bores is if you use old school roller tappets that are short. Old Comp's were like that. The tie bar hits the top of the lifter bores when the cam is on base circle. With flat tappet there shouldn't be an issue. Like any motor uusing non factory parts. When in doubt mock it up and look/measure. Look close on this mega block. You'll see what I mean. It has tall lifter bores as well with 7/16" pushrods.
Doug