Use the Manley (stock type) Rockers cause they will not go bad and change the rear gear. No matter what cam a 302 Chevy runs it needs a stiffer gear or change the trans gears to have a lower first gear for easy light to light driving. Re do the distributor curve and have Eric tune/go over your carb. Then go have fun.

lmao

With the M-20 trans and the 3.73 rear gear, you're already equivalent to an M-21 or M-22 with a 4.27 rear gear. Running a 4.56 rear with the M-20 would be equivalent to a 5.22 rear with a close ratio trans. First gear would be a screamer.

Love my M20 with the 4.56 gear in my Z.

I wound up ordering a custom ground Bullit cam -

can't wait to install it - I have a set of roller tip comp 1.52 rockers, heads already have screw in studs and guide plates - and I will be installing stiffer springs to compensate -

the cam is thus!
CHS 278/282-F12+5
Duration @ .050 = 248/252
Lift with 1.5 rocker = .530/.540
Valve lash (hot) = .016/.016
Lobe separation = 112
Intake centerline = 107

so kinda like a tight lobe LT1 with much more aggressive ramps.

I'll be running a set of 1 3/4 Kustom clone Z28 Headers -
I ordered a Flowmaster American Thunder exhaust setup = but I won't be running he Super 44 mufflers, but rather (either) the Dynomax Ultraflow SS or a Set of Borla XR-1 mufflers -
I like this system because the tail pipes (while larger at 2.5") exit in the stock location with a 45" cut like the original tailpipes.

keeping the m20, and 3.73s

Also will be installing a set of BFGoodrich or Coker WideOval Radials on a set of vintage Minilite wheels -

CAN NOT WAIT!!!

I have the Borla XR-1's on one of mine, a little loud but I like it.
Sorry for the crappy cell phone vid.

Sounds like a good combo Aaron. Keep us in the loop.

I am sure you have already considered this, but if you wanting more aggressive than an LT-1 camshaft, using "stiffer springs" you are risking lobe failure. You can combat to some extent by using edm lifters, and making sure you use a good high zinc oil.

Still, if I were going stiffer than stock springs, I think I would just go with a roller cam package. Just my .02 cents. Wish you luck either way.

Yes I have - and actually - almost had a catostrophic failure with the LT1 cam due to TOO MUCH ZDDP.

I had foolishly assumed that if one bottle of ZDDP+ was good, then a bottle and a 1/2 would be better insurance -

BOY was I wrong - after 800 miles, the lifters had spalling - but not obvious damage to the cam lobes and it mic-ed out correctly

I do however have more spring pressure than the stock Z28 springs - but not 130-140lbs like the current solid flat tappets want

Do you get a highway drone in the car?

I am either ordering the XR1 or Dynomax Welded Ultraflows