Holden V8 in 1985 RRC

[Richard Kaye]

Hello,
I have a 1985 RRC with a Holden 304 (VN heads, no computer), 727 auto and straight LPG through an IMPCO 425. I was wondering what intake and exhaust manifolds other people are using on a setup like this, also the camshaft, standard or another grind. Also any other tips, tricks or information people have with a Holden V8 in their RRC. The picture is my 304 with a single plane intake manifold, currently I have the original EFI banana manifold with the IMPCO 425 and Rochester base plate bolted to it. The exhaust manifolds are the cast type, I don't know which model of commodore they are off but they just fit in there. Also the LPG consumption is around 25 litres per 100km, does this sound excessive?
Regards
Richard.


131183

[Vern]

I used to have a holden 336 stroker in an old rangie with t700 trans, cam was mild, had extractors as they made them for rangies, not vn heads though, and ran a stock port matched intake with quadrajet carby.
Used 26L/100 on 35's.
I have vowed to never own a petrol 4x4 again[emoji4]

[350RRC]

The 727 has a thirst all of its own.

DL