Down under we are in the same boat, we are going 10.0/10.1 but definitely want to be in the 9.8's for our Drag Challenge which is like your Drag Week. Our plan is to take a bit off the heads and get comp up slightly to about 13-1 and change over to E85 with a dyno session.

I know you said you don't want to spray it, but a 50 shot plate kit would get my vote.

Set of flat tops into that other short block, TF heads, bigger cam...... should be well into the 10’s.
Also, the pistons can be swapped, heads and cam installed into the other long block, then it’s a weekend motor swap and you’re ready to rock.
Opening day of DW will be here before you know it.

But I also agree that a small shot is the quickest and easiest path forward.

Unfortionitly the 418 is 4.185 bore and the 374 is 4..080

You already have the heads. I wouldn’t waste money on different ones. My vote is to try the heads, and have your current cam reground with another 15 degrees and more lift. A cam regrind is only 150 bucks.
The w2 is gonna work better than any aluminum head that doesn’t have a offset rocker. Even if the advertised flow is the same as the w2 the w2 will make more with the extra cross section.

Unless I missed something......... the current combo is running X heads.


Edit: I see where he “has” some w2’s.

I have worked at weight reduction without spending money and my car without me in it is still over 2900. When your running exhaust and have to fit drag week rules, you can't just start cutting everything out of the car.

And you cant put a 50 shot on a car running in the NA classes

To kill 2 birds with one stone would be a set of aluminum heads on the 418. Have the chambers opened up to fit the big bore and kill some Comp and unshroud the valves. I would opt for indy heads with bigger port than the trick flows although the TF's with a mild street friendly gear would work well

I think the plan of the minute is to put my w2s on the 374 with a old comp 20-730-9 that I have and try it. The new to it cam is 627 638 lift and 276 281 at 50.

It’s easy spending other people’s money........ but that’s def not the cam I would use.

I was thinking(I know..its hard) just put the 13:1 engine back in (as is) and
pull some timing and put a good meth kit on it.. simple.. you dont care how
quick it is on the street but you will have the torque you will need with the
416